Obviously, they like Undertale as well as Deltarune. They also like anime. Their favourite is The Promised Neverland. They also love music and the band Imagine Dragons's songs have helped them get through a lot and realize how they feel about their self. For some reason they talk in third person about them self on their User page, but not on their comments and talk page, like Juvia from Fairy Tail.
Millennial cognitive abilities (no offense)