Can I still be fictionkin with a character if me and that character have different sexualities? For example, say the Character I’m fictionkin with was a heterosexual girl and I’m a homosexual girl.

Yes, of course you can. People’s sexuality can change over time, even during one life, it can absolutely change between lives.

Being kin doesn’t, at the end of the day, isn’t exactly about what similarities you do or don’t have with your kinself. We all change. Our kinselves are a part of who we are, but its not all that we are. You don’t ‘have’ to be similar to your kinself in any particular way as long as there is something about them that wakes you up and tells you that’s who you were. That you experienced or are experiencing, or even will experience, being that person.

Being kin especially doesn’t have anything to do with who you are now physically. You don’t have to look the same, or be the same race, or age, or weight, or gender or ANYTHING. This life is new and different than that one.