WARFARIN BACKSTORY: FROM KAZDEL TO TALOS-II

Warfarin is a centuries-old Sarkaz vampire doctor who quit war, was tricked into Rhodes Island by Kal’tsit, and now runs it on Talos-II. In Arknights Endfield she calls Gilberta by the wrong name, and the game files hint at whose.

This is Warfarin in Arknights Endfield: centuries old, and running Rhodes Island on a brand new planet. Endfield gave her the most elegant close-up of her life, and the fandom immediately turned it into a gremlin grin. But the wildest thing about Warfarin is that, in Endfield, she calls a girl by the wrong name. The game never says which name. The game’s code does. We dug through both games to find it, including a story that is so far only out in Chinese.

How we checked this. Every quote is from the official English text of the original Arknights or Arknights Endfield, except the Chinese-server scene, which we translated ourselves. Where we connect the two games, we say so. The images are frames from our own Warfarin video, built from official Hypergryph and Gryphline art.

Endfield Hub is a fan-made resource and is not affiliated with Hypergryph or Yostar.

TL;DR

• She is still a gremlin. Her file has operators waking up on her surgical table to sinister laughter, she plotted to sedate Skadi for a blood sample, and Kal’tsit banned her from a patient in writing.
• She is a vampire who quit war, spent two hundred years training herself not to bite people, and became a doctor who refuses to treat anyone in a war.
• Kal’tsit tricked her into Rhodes Island with one rumor, and had Mon3tr tie her to the side of the ship.
• Losing Kal’tsit broke her more than she shows. She reports a patient’s death in four words and stops halfway through Kal’tsit’s name.
• In Endfield she makes new people out of old memories, and she has been twenty years old for five hundred years.
• She called Gilberta by the wrong name. Gilberta’s code is chr_0013_aglina. Angelina’s is char_291_aglina.

The Gremlin

In the first Arknights, Warfarin looks like a tiny, elegant vampire lady. Fans never bought it. For years, artists have drawn her as a gremlin: wide eyes, fangs out, and a grin that says she is about to do something terrible to you, for science.

And the game backs them up. Her own file says that “several Operators reportedly experienced sudden, unexplained blackouts in the early days, only to wake up on a surgical table with sinister laughter ringing in their ears.” The company had to ban some of her ideas. She still does not think she did anything wrong.

So when the Version 1.6 trailer ended on a serious, beautiful new Warfarin, the fandom had one reaction. That’s not her. This is her.

But to understand how a gremlin like that ends up running Rhodes Island on another planet, you have to go back. A long way back.

Origins: The Vampire Who Quit

Warfarin is a Sarkaz, a race the rest of her world treats like demons. And she is a vampire, the kind of Sarkaz that even other Sarkaz are scared of. The legends say vampires “stalk the night, feed on the blood of men, women, and children.” Ask Warfarin about that, and she just shrugs: “That’s most of my kin, yes.”

She has a theory about her family. Do anything for a hundred years and you get bored of it: “most Vampires are sick of fighting for exactly that reason.” But a hundred years also turns it into a habit, and when the whole tribe has the same habit, it becomes the rule. “In other words, it’s a social norm for us Vampires to thirst for blood and war.”

Warfarin broke the rule. “I got tired of war. I got sick of it.” She walked away and spent the next two hundred years training herself not to bite people. That’s the good version of her. That’s her with two centuries of practice.

She gave herself one rule as a doctor: never treat anyone who has anything to do with a war. Which is a tough rule to keep when your people’s royal courts keep trying to recruit you for their wars.

So she hid, in a tiny town near the border of the Sarkaz homeland. Why there? Because it was easy to mail her research out of the country. Even in hiding, she had deadlines.

One day a warrior kicks in her door with an official summons: “the fate of our kind hangs in the balance.” Warfarin does something to him he can feel, and tells him calmly that his blood is starting to clot. In fifteen seconds, he’ll be a statue. He runs. A local kid asks if she can really do that. “Of course not. I was just scaring him.”

Meanwhile, she was publishing. Some of the most respected medical books of recent decades were written by someone called Mr. Blood. Nobody knew who Mr. Blood was. It was her. She picked the name to hide what she was. Now she just thinks it is hilarious.

Years later, when Aak, a doctor who openly despises mainstream medicine, found out Warfarin was Mr. Blood, he could not stop dragging her into academic debates. The two turned out to be “an unexpectedly good duo.” Rhodes Island’s files report that the strange laughter coming out of the labs now comes “with two voices instead of one.”

Origins: The Rival

Before all that, someone humiliated her. Decades ago, a stranger wrote a long article in her medical magazine, tearing apart every one of her theories.

The worst part? Warfarin was not wrong. “I wasn’t wrong, but all the things she pointed out were indeed issues that I neglected or didn’t consider.” So she redid the whole experiment, got better results, and fired back. Then she wrote about a dozen more replies. The stranger never wrote back. Not once.

That stranger was Kal’tsit, who “didn’t even bother to use a pen name.”

If you never played the first game, you will meet that name a lot on this page. Kal’tsit runs Rhodes Island’s medical side. Her file lists expertise in metallurgy, sociology, archaeology, history, economics, botany, geology and more. She seems to know everything, and she explains almost none of it. And she is never alone. At her side is Mon3tr, a huge, clawed monster that fights for her, and that Kal’tsit made herself. If Kal’tsit wants something done, Mon3tr is how it gets done.

Years after the feud, Kal’tsit showed up at Warfarin’s door to recruit her for the Sarkaz king, Theresa, and proved who she was by pulling out those exact magazines. Warfarin threw her out, and quit the magazine forever.

Origins: The Trick

Kal’tsit came back after Theresa died. This time she was not recruiting. She was carrying a little girl: Amiya, the new king of the Sarkaz, a child who could not control her powers. Warfarin treated her. And then Kal’tsit asked her to join Rhodes Island.

Warfarin said no. “I’ve heard plenty of pompous big talk in my lifetime.”

So the next morning, Kal’tsit told her it no longer mattered. She had already spread the word: Mad Doctor Warfarin has joined Rhodes Island. Centuries of hiding from kings, ended by one rumor.

Warfarin is still mad about how she got to the ship. In her own words: “You made Mon3tr lash me to the side of the ship four years ago.”

She stayed for one reason. Kal’tsit showed her real research toward curing Oripathy, the crystal disease her patients are dying of. In Warfarin’s words, it convinced her, “albeit only barely.”

The Files: Her Patients

And then she became a company doctor. Which means paperwork. A lot of it. And her reports read like she is being held hostage. Most of them are not in her own profile but in other operators’ medical files.

• Frostleaf. So sick Warfarin “could not be optimistic about her chances.” She pulled through. Warfarin’s note: “Hooray. Hooray.”
• Ch’en. A report so juicy the city of Lungmen confiscated it. Warfarin’s review: “no big deal at all. Lame.”
• Degenbrecher. Pat her on the shoulder for comfort? “Don’t actually pat her shoulder. My hand still hurts.”
• Tin Man, a robot. Infected or not? “You got a pen, you can write it yourself.”
• Miss.Christine, a cat. The scanners refused to produce any image. “Warfarin eventually abandoned any attempt to track Miss.Christine’s infection status.”
• Wang. Readings off the charts, then zero. ”…I asked the Doctor. Just write a zero.” Signed: “Warfarin, looking up at the ceiling with despondent eyes.”

The Files: Her Targets

Those were the patients she did not care about. The ones she did care about had it worse. Because those, she wanted to collect.

• Toddifons, the ship’s first infected Vouivre, a dragon-like race. Warfarin’s entire note: “We finally got one!”
• Bagpipe. Maybe too tough to even catch the disease. “Test it out? No, that’s not an option.” You can hear that hurt.
• Entelechia walked out of her checkup with her own blood samples. Warfarin: “And you didn’t stop her?”
• Kjera. “Let me draw a little blood, that’s all.” Kal’tsit, right underneath: “Ask her yourself.”
• Astesia. Kal’tsit, in writing: “Warfarin is strictly forbidden from accessing this operator’s file and from participating in this operator’s treatment.” Astesia saw Warfarin’s name on the duty roster and decided her sore neck could wait: “I’ll check again another day.”

Why so strict? Underflow’s file drops a hint: don’t worry, this won’t turn out “the way it did with Skadi.”

Skadi’s file explains. A secret meeting of the medical staff. Warfarin’s plan: sedatives in Skadi’s food. “Enough for two hundred people should do, right?” Then “a little bit of blood… Maybe a pinch of muscle tissue too?”

“Dr. Kal’tsit? How long have you been here…?”

Fined one month’s salary.

Did she learn? Her module’s official statement: the blood bank “has not, to this day, lost a single blood sample.” Her private diary: “Collecting a few extra samples while I’m off the clock should be fine, right? That Skadi op, not to mention Specter and Gladiia…”

She did not learn.

The Files: Her Chaos

And when she is not stealing blood, she is causing chaos. Usually involving Gavial, the ship’s other doctor, who can reportedly crush a rock with her abs.

• Flint wanted to know if that was true. “Warfarin said if I get treatment from Gavial, I’ll know firsthand how strong she is.” Then: “Hm? Doctor, why are you stopping me?”
• Xanthos. Warfarin got so absorbed in “a rare blood sample” that she forgot the duty roster, and the one patient who was never supposed to meet Gavial walked into Gavial’s shift. Gavial “patted his shoulder in approval, with considerable force. Everybody quite freaked out.”
• Humus, a patient with twice Warfarin’s lung capacity. “He’s a case that’s very much worth researching!” Gavial, in the margin: “Maybe you just gotta get out more.”
• Poncirus. When Warfarin asked to treat a new patient herself, the staff said: “THAT Dr. Warfarin? Well… she has my condolences.”
• Closure, another vampire on board, ranks every vampire she knows. Number one, “the Vampire she does not dislike”: Warfarin. Last place, “the Vampires she would rather die than meet”: her own parents.
• The clichés. Warfarin swears she is nothing like them. A fancy coffin in one roguelike mode: “Warfarin says this is merely a stereotype.” Her Witch Feast outfit’s entire description: “This is her home.”

But her most stubborn patient was always her own boss. Kal’tsit ran the medical department, and for almost eight years she kept putting off her own checkup.

It took losing Kal’tsit entirely, and a resurrection machine called the Sarcophagus bringing her back, before she “finally agreed to undergo a physical examination.” Warfarin’s official finding: Kal’tsit “is not cold-blooded.” And watching Kal’tsit act “as if nothing had happened” left her feeling, in her words, “less accomplished.”

Underneath, one line from Mon3tr: “Leave her physical examinations to me from now on.”

The Part the Jokes Hide

But here’s the thing. Read enough of these files and a different Warfarin shows up. To see her, you have to go back to the day Rhodes Island lost Kal’tsit.

First, who is Priestess. Long before anyone on this world, there was an older civilization. Priestess was one of its scientists, and the Doctor was her partner for countless years. Together, they finished making Originium, the crystal that powers this entire world and causes the disease Warfarin has spent her life fighting. And Kal’tsit? Priestess made her, too. Kal’tsit was her creation, and Kal’tsit turned against her. Because Priestess’s plan is to pull everything, every living thing, into Originium. Kal’tsit’s verdict: that makes her the enemy of all life on this world.

She has been sleeping inside Rhodes Island the whole time. Rhodes Island is a giant moving ship, run by a computer system called PRTS. Its heart is buried in a sealed zone deep inside the ship called the Abyss. That is where she may be sleeping. In the main story’s fifteenth episode, she starts to wake up. PRTS slips out of control. The corridors rearrange themselves. Communications die. Crystal monsters roam the halls. And the ship changes course on its own, heading straight for a giant deposit of Originium.

The Sarcophagus. Kal’tsit could take the system back, except it has been set to lock out one person by name: Kal’tsit. There is only one way around it. She has to climb into the Sarcophagus, the strange old machine where Rhodes Island once found the Doctor asleep, and plug her own mind into the ship. (The Doctor, by the way, is Rhodes Island’s commander: the character you play as.) The machine warns her first. Doing this will badly hurt her body, and she will lose any chance of living longer. Kal’tsit does it anyway: “this duty is not a shackle. It was always my choice.”

It costs her half her life. And it cuts the bond between her and Mon3tr, a bond the game says had lasted more than ten thousand years. Yes. Ten thousand. Her words to Mon3tr: this is the only thing I can do for you, before I go to face her. The rest is up to you.

Two old rivals, working as one. With Kal’tsit wired into the ship, the crew can finally talk to each other again and fight back. Warfarin’s lab sends her its research on the crystal monsters, and Kal’tsit turns it into an upgrade for every operator on board.

The deck. The crew fights its way down into the Abyss. And there, Priestess lifts the Doctor, Kal’tsit and Amiya up onto the ship’s deck, to face her alone. Kal’tsit had set a trap. Mon3tr and Amiya blast Priestess’s body to dust, until all that is left is an empty white coat. But it was a decoy, a copy made of Originium. The real Priestess is fine. And she controls every crystal in the world.

Kal’tsit has a small patch of Originium on her shoulder. Priestess makes it grow. In seconds, the crystal swallows Kal’tsit’s whole body and shatters in the wind. The game’s own narration: “A long life ends here.” And Mon3tr, cut off from her, curls up into a black crystal cocoon.

Then the Doctor remembers something Kal’tsit left behind: a set of formulas. Amiya runs them backward, and it cuts Priestess off from the crystal she controls, just long enough to hold her back. Amiya moves to finish it, and Priestess turns to the Doctor. “You want to kill me?” Then, before anyone can answer: “You missed your chance.”

Amiya collapses. The ship turns to crystal around them, and as the crew drags them out, Amiya grabs one last thing: the cocoon that used to be Mon3tr. They get everyone off. Priestess seals the whole ship inside a giant crystal. Whether she is still in there, nobody knows. The Doctor’s verdict: “I will not forgive her.”

Warfarin’s four words. In the middle of all that, Warfarin loses a patient she had cared for over three years. She reports it in four words: ”…One dead. A patient.” Then she starts to say she will report to the Doctor, and to Kal’tsit. And stops halfway through the name.

Mon3tr steps out. All they have left is that cocoon, wrapped in Kal’tsit’s clothes. For a month, the Doctor and Amiya keep visiting it, hoping for a miracle. Then it starts to grow, like a tree, its veins storing everything Kal’tsit ever was. And out steps Mon3tr. Not the huge monster any more. A small woman, the size of a person, who looks a lot like Kal’tsit. She puts on Kal’tsit’s clothes and says: “You gave me freedom.” She can see all of Kal’tsit’s memories, but she cannot sense her presence any more.

Warfarin examined her, and admitted something only to herself:

“She may have all of Kal’tsit’s memories, but it’s hard for me to treat them as the same person.”

The stethoscope. So when the rebuilt medical department held its very first meeting, Mon3tr walked in, stood quietly in the corner, and listened. Around her neck was “Kal’tsit’s stethoscope… Although she got it upside down.”

Warfarin saw her and lost her words in the middle of her speech. Then she raised her voice and said she did not think Mon3tr was trying to copy Kal’tsit. Mon3tr had inherited all her memories and was trying to process all that pain. She “needs a little… no, a lot more time, just like the rest of us.”

Then Warfarin hired her: Medical’s official special consultant, by a show of hands. The file notes that in surgery, Mon3tr uses two talons to hold the patient still and two more to distract them. Kal’tsit never did that.

What other operators notice. Whisperain, a mourner who spends her life saying goodbye to the dead, wonders “what ‘mortality’ is to those with true longevity, like Dr. Warfarin and her people.” When they bid farewell and shed not a single tear, is it “only because theirs have long run dry”?

The story that is only out in Chinese

In one Chinese-server story (translated by Endfield Hub), a new patient arrives at Rhodes Island: a young courier with powers that control gravity. Warfarin is supposed to explain how to use them safely, but she is called away to a meeting and cuts it short.

The girl uses her powers to help people carry things. The crystal in her body reacts, and she ends up in critical condition. And Warfarin, who almost never admits a mistake, says it plainly: “It’s my fault” (是我的问题).

After the girl recovers, Warfarin sits her down, very seriously. Gravity powers are extremely hard to control. If you cannot control them, use them as little as possible. The girl takes it to heart.

Her name is Angelina. And in the original game, Angelina’s medical file is signed by her doctor: “Medic Operator Warfarin.” Remember her.

Endfield

Now jump forward. A long, long way. Arknights Endfield is set on another planet, long after the first game. Almost everyone from those files is gone. Warfarin is still here, still running Rhodes Island. The game never calls her a Reconvener.

And she has a new job. She “found a way to commune with the data shards” of the old world, and lead them out of a strange crystal forest, the Originium Woods, as living people. Endfield calls them Reconveners. Each one carries someone’s skills and faded memories, but each one is a brand new person. The game calls what she does an act of creation: “Leading Reconveners out of the Woods is essentially an act of creation. Warfarin bore the responsibilities for her actions.”

The woman who once said Mon3tr needs time, just like the rest of us, now makes new people out of old memories for a living.

She complains about it constantly. And after every meltdown, she reminds everyone of her “years of extensive experience.” Endfield’s files keep count for you: “500 years a century ago, 300 years half a century ago, and dropping to 20 years in her most recent claims.” She moved to another planet, and the age lie came with her.

For more on how Reconveners work, see Are Endfield Characters Different From the Originals? Endfield never says outright that M3 is Mon3tr; our M3 lore post weighs the evidence.

The Wrong Name: Is Gilberta Angelina?

Which brings us back to that line. In Endfield there is a girl named Gilberta, a messenger who walked out of that crystal forest. When Warfarin sent her out into the world, she gave her no missions and no deadline. Just three words: “Go see the world.”

Gilberta says Warfarin once “remembered my birthday wrong,” then “called me by the wrong name in panic.” She looked “really confused … and lost.” And after Gilberta left, Warfarin “brooded by the dinner table by herself for a really, really long time.”

The game never says what name came out. So let’s look at the evidence.

1. Fox girls. Gilberta is a fox girl. So is Angelina.
2. Supporters. In battle, they are both Supporters.
3. Messengers. They are both messengers. Angelina even says she would rather deliver letters than fight.
4. Gravity. Both of them control gravity.

5. The same little trick. Before a surprise photo with the Doctor, Angelina counts down: three, two, one. Gilberta does the exact same countdown before she pulls a birthday cupcake out of thin air.
6. The stars, closer. Angelina’s birthday gift to the Doctor is to float them up into the night so the stars seem closer. Gilberta floats a lonely little girl up into the sky to watch the stars.
7. The disease. Angelina’s medical file, signed by Warfarin, says she is infected with the crystal disease. Gilberta’s file says she is clean. Whoever Gilberta came from, she came back without it.
8. The code. The one that is not a coincidence. Every character has an internal code in the game files. In the first Arknights, Angelina’s is char_291_aglina. In Endfield, Gilberta’s is chr_0013_aglina.

Same codename.

The game never says it out loud, so treat this as our reading. But if it is right, then the girl Warfarin once nearly lost, and told to use her powers as little as possible, walked out of that forest, long after, as someone new. And this time, Warfarin told her the opposite. Go. See the world.

Angelina’s birthday is May 14. Gilberta’s is November 28. So when Warfarin got Gilberta’s birthday wrong, we cannot prove which date she said. But we have a guess.

More on Gilberta’s letter in our Gilberta lore post.

The Last Words

When Endfield’s previous leader, the Previous Endministrator, finally fades away, they murmur the names of the people they are leaving behind:

“M3… Warfarin… Lesun… Zasso…”

The first is M3. The second is Warfarin.

So yes. She is a gremlin. She drugged nobody only because Kal’tsit walked in. She steals blood on her days off. She has been twenty years old for five hundred years. But she is also the one who remembers everybody. Even when they come back as someone else.

What the files don’t say yet: how Warfarin reached Talos-II, how long she has been there, whether she will become playable, and whose name she said to Gilberta. Gryphline has said the Rhodes Island story “will unfold in future versions.” We will update this page when she gets her own lines.

Related Reading

• Who Is Warfarin in Arknights Endfield?: the short explainer and the 1.6 PV
• Who Is M3 in Arknights Endfield?: the being Warfarin knew as Mon3tr
• Gilberta lore: who is her blank letter for?
• Are Endfield characters different from the originals?: how Reconveners work
• Amiya’s fate in Endfield: what became of Warfarin’s first patient
• Endfield lore hub: every operator backstory and our story Shorts