FK

FK is JJ's plush toy that she brings with her to the island. It appears to be part deer, part cat, and part something else. It is named after Forrest Kaysen from the video games Spy Fiction, Deadly Premonition, and D4: Dark Dreams Don't Die, and possibly the "FK in the coffee" meme that Deadly Premonition inspired.

Early in the game, when JJ is struck by lightning, FK crumples into dust, causing JJ to finally break down and cry from all that has happened to her in the past few minutes (having Emily go missing, witnessing the hairshrieker appearing to kill a copy of her, and being struck by lightning).

It's not long after that, however, that JJ receives a text message apparently from FK on her phone. Her initial reaction is to respond with a "WHO THE FUCK?!" sticker, but she soon appears to accept that FK is indeed real and that her plush toy that got crumbled into dust after a lightning strike is indeed texting her.

JJ's relationship with FK is generally antagonistic, and she frequently dumps on it and calls it stupid. FK almost always responds with confusion and a childlike lack of understanding of JJ's complex emotions and the situation that she's in. Its stickers all involve deer in some way and are always upbeat. One even references the "doge" meme.

Eventually, JJ snaps at FK after she witnesses Emily's suicide. FK tries to cheer JJ up and begs her to go back to normal, and JJ calls it a "stupid fucking plushie" with "stuffing for brains," and then attempts suicide herself.

Later, FK becomes an encouraging voice, telling JJ to fight back against the hairshrieker, and that the entire situation she is in, is a "story of regeneration." JJ uses this encouragement to fight back against the hairshrieker.

Upon waking up from the dream and the suicide attempt she committed in the real world, JJ discovers that clinging to FK stemmed the bleeding from her wrists, and saved her life.