(Kem uses they/them pronouns.)
I'm outlining a story about a witch named Kem who has to protect the world from evil. Kem befriends demons and other witches, but I don't want them to find a crush or anything and I want to keep their feelings for everyone are platonic or familial. I want the reader to understand that Kem isn't looking for love, they're just navigating the world of witchcraft and battling baddies. So how do I show the reader that Kem's relationships are entirely non-romantic, that Kem has no attraction to their friends, and that there will be no romantic sub-plots? I don't want people to ship Kem with other characters either, so how do I make it absolutely clear Kem is just there for friendship and companionship?