after i finished reading the 3rd volume of the light novel i came up with the conclusion that satsuki is actually sorawo's older sister, not just because many times the fact that sowaro kinda resembles her comes up, but then she let her hair grow and everybody (toriko and kozakura) couldn't deny how much she looked like her (and this may mean nothing but they both wear glasses). Like, I mean, it is true that sorawo isn't that tall, and her face doesn't have an actual "nasty look" most of the times, but I was thinking that it's because they may have different fathers but share the same mother. And also siblings don't always look like a copy of the other jajaja. Also both satsuki and sorawo share the same kind of obsession for the otherside, if that makes sense