Sexuality: He would be either gay or pansexual in my opinion, I think if he would be questioning around the times that he met Renet and Shinigami and after a while realize that he only liked boys or liked anyone, I also see him as either demisexual or grey-asexual or asexual as he would be attracted to someone romantic at first and either started liking them sexually when getting to know them or never be sexually attracted to anyone!

Gender: Like with Raph I see him as either cisgender or a demi boy as he would still use he/him pronounce but I wouldn't be surprised if he used they/them pronounce too!