Hey! Sorry for such a late reply - the game just got updated.
I'm happy to hear you like Welkin so much. Usually, VNs put readers in the shoes of a blank-slate protagonist, or someone we're supposed to pretend we're playing as, but with Welkin, I always wanted him to be his own character, with a personality different from the other three.
Sometimes I think, it would be cool to see a chapter (or maybe a short side game?) from a perspective of some other character, so we could interact with Welkin as well :-)