I'd love to interact with Rikku more. She'll be friends with anyone who will let her, and has a soft spot for the quiet ones (especially ones who don't tell her to sit still or be quiet). As she struggles with self esteem feeling like she can't be a hero herself maybe we could build something off that? In addition/or else, maybe she could help with the rut in some way. She wouldn't think a person has to be a particular way to be capable of great things, and she tends to look up to or even idolize anyone she cares about.