I had the idea for a Yukisayo lovechild and I'm too lazy to draw him but I still wanna talk about him so! (I might edit in a picture once I get off my butt)

he has no name yet, but he does have a personality. he's very friendly and loves playing the guitar, both acoustic and electric, and singing, both of which he's done since childhood. even though he's a rather relaxed person usually, he's pretty hard on himself especially when it comes to music - with both his mothers being professional musicians, he often feels like he could never live up to them. but Sayo in particular is a big comfort to him since she knows the feeling all too well. he's probably closer with her than Yukina, even though he still loves Yukina of course and they have their own way of caring for each other, like singing together or him working backstage for her & Roselia's live shows

he's really a very pleasant guy and good company (if pretty quiet even on friend gatherings), he just ... needs someone to tell him that it's fine to fail every so often. ironically he's not strict with others at all unless he's teaching them - if you don't really care that's fine, just be honest about it and have fun, that sort of mindset. if you actually ask for a critique from him though, prepare to cry. he may not be rude, but he will be ruthless, because he thinks it's the only way to improve

if you have name suggestions shoot, I haven't found anything that clicks for him yet!