Decibel is the best designed character out of all protags in Reborn. I had this opinion ever since I saw Xyrs design, and it hasn't been changed ever since. Decibel is just that good
That feels weird, espeically on everyone in the cast. But the point, I have always thought Decibel as non-binary and because of that, I'll most likely call by the xyr pronoun. I do admit I don't remember xyr pronoun because I rarely use it.
Personally I'm very thankful for this change, because Decibel is my favorite PC but I prefer playing as a male character over non-binary. So it is an excellent idea to let everyone play with the sprite they like, and the gender they want ^^
Never told people aren't allowed to choose the protag as they want, but I do not disagree with that statement at all.
As opinionated, I do like almost all of the protags design. Just one I don't like because one color overshadow the body so hard that it's not pleasing to look at the character.