These seem fun! I've read through a couple and wow you're great at writing!
Character Link: Leviathon
Mood/Keywords/Theme: He's meant to symbolize loneliness so something to do with that could be nice! The ocean/books/nature in general/and plays are also part of his character aesthetic. Melancholic.
Other Details: He's in a modern setting, lives with his dad who works most of the time to support both of them, was abandoned by his mom. He hates his name as his mom named him. He has a bunch of part time jobs and loves to write stories and plays. His stories and plays are based off of his dreams, which are actually memories of his past lives. Also enjoys nature, none of this has to be incorporated however and you're free to add anything you like as he is still in development.
Song (optional): Unlike most of my ocs Levi doesn't have any songs yet but I'd love to hear your choice if you think of one that fits him :> I do however have a character insp folder for him if you'd like to see: http://sta.sh/2m9rypds9pc
Gratuitous Japanese (Y/N): Why not, I know some japanese.