ralsei and lancer are the only main characters who would not create "absolute god of hyperdeath" type OCs. noelle berdly susie and kris all would do that in different ways. ralsei just makes a little friendly fellow and lancer's OC is just himself. and ralsei's like "lancer, you, um, just drew yourself." and susie's like "You're just jealous because his character's fucking awesome." and Lancer would say something comedic that rhymes.
actually i think ralsei WOULD make super op mary sue type character but like. friendship style. he'd be like "this is my oc, they're friends with everyone and can end any fight without violence. they have all of the magic in the world and use it to make sure everyone is happy and the world is always peaceful, and everyone is welcome in their castle town and everyone who lives there is always happy and they're all friends there and everyone gets along!" and it would clearly take some design inspiration from kris' appearance which kind of makes them uncomfortable