fictionkin

Otakukin sound like something out of a science fiction or fantasy novel. However, that is precisely what they are. Most simply stated, otakukin (or fictionkin) are humans who, in a past life, were someone or something else, drawn out of multiple universes or worlds.

2009, American Folklore Meeting, Program and Abstracts, page 95

Once such group's members subscribe to a metaphysics that considers fictional worlds fully real, or that regards what most view as reality as another fiction. Included here are fictionkin and mediakin, people who claim spiritual or soul […]

2018, Hugh Urban, Greg Johnson, Irreverence and the Sacred: Critical Studies in the History of Religions

Otherkin: The living proof that there should be laws preventing nutjobs from networking, this thriving subculture sprung from Ringer and fantasy role-play Internet communities in the 1990s. Its dysphoric members identify as not fully human, be them Fictionkin (those who identify as fictional characters), Animalkin (identify as animals), Conceptkin (identify as abstract concepts), and Weatherkin (identify as weather systems), some even claiming physical, mental, or spiritual shapeshifting abilities!

2021, Diego Jourdan Pereira, Bizarre Bathroom Reader