I'll give ya sibling 4 as a younger sister.

Which leaves Hoshido's siblings. I think I'll snag the first and make her an older female, probably mid 20s or so.

[@Dynamo Frokane] If you're open to playing the second male sibling, that would be great. If you're not up for that, we can talk more about meeting in the middle, otherwise I'd be fine doubling up and this returning to a 1x1x1 situation.