You never meet Rattina — and that's exactly why she matters. Everything the story hints at (the experiment, the Corporation, the Stalker) runs through the sister who isn't there.
Ratthew's twin sister — "the smart one in the family"
The Animal Corporation, before she vanished
Lore-only so far: mentioned by Ratthew, photo in the Room 5 safe
Missing — fate unknown as of July 26, 2026
Ratthew's farewell gift is a key to the safe behind the cat poster in Room 5. What's inside is all about her:
A missing Corporation employee, filed next to proof of a successful experiment that made a "shadow" see everything — the community's leading theory is that the experiment created the Stalker, and that Rattina either ran from it, was silenced for it, or was part of it. The game hasn't confirmed any of the three.
Asking what happened to Rattina gets you a lot of confident answers online, so it is worth separating the four things the game actually puts in front of you from the conclusions people draw. Every row below is something you can see in-game; the right-hand column is what it stops short of establishing.
| What the game shows you | What it establishes | What it does not |
|---|---|---|
| Ratthew names her as his twin sister | She exists in the fiction, and she is family to a character who is explicitly not an anomaly. | Anything about where she is now — he is looking for her too. |
| She worked for the Animal Corporation, then vanished | A link between her disappearance and the organisation the whole plot circles. | Whether she left, was taken, or is still there. “Vanished” is Ratthew’s word, not a case file. |
| Her photo is in the Room 5 safe | Somebody at the hospital was keeping a file on her, and Ratthew took the key off a doctor. | Who kept it, or why. A photo in a safe is not a fate. |
| The note: the experiment succeeded, and the shadow now sees everything | That an experiment happened and something called a shadow came out of it. | That Rattina was the subject, the researcher, or a witness. The note does not mention her at all — it is filed next to her photo, which is proximity, not causation. |
Put plainly: the honest answer to what happened to Rattina is that the game has not said. She has no model, no dialogue and no scene — she is a name, a photograph and an absence. Any page that tells you she was experimented on, or that she became the Stalker, is filling in the same blank you are.
Rattina's TOP SECRET suitcase matches the ones carried by Dr. Harlow and Ron from Accounting — three separate storylines all pointing at the same Animal Corp secret. And the July 10 update added Liz, a journalist fired by Animal Corp for telling the truth about the infection. The cast keeps growing in one direction: toward whatever happened to Rattina.
Unknown — but the signals point that way: the developer keeps expanding the lore cast (Liz arrived barely two months after launch), Ratthew's storyline ends on her unresolved disappearance, and community demand is real enough that a fan-made Rattina plushie already exists as a Roblox UGC item. If she shows up in a future update, this page gets rewritten within a day.
The game has not said. She is Ratthew's twin sister, she worked for the Animal Corporation, and she vanished — that is the whole of what is stated. Her photo sits in the Room 5 safe next to a note about a successful experiment, but the note never mentions her. Anyone telling you she was the subject of that experiment is guessing.
No. As of the last check she has no model, no dialogue and no scene — she exists as a name Ratthew says, a photograph in a safe, and an unresolved thread. That is why the question of what happened to Rattina has no confirmed answer yet.
Rattina is Ratthew's missing twin sister — 'the smart one in the family.' She worked for the Animal Corporation before disappearing, and her photo is one of the items hidden in the Room 5 safe.
Lore verified against community data; theories are labeled as theories. Last checked: July 26, 2026.