Renolds was originally gonna be a bad guy and be in Andrias’s gang as The Annihilator. But the writer admittedly got guilty on who Renolds was gonna be so the author made him a hero instead.
Hilda was originally going to return home during the events of The Annhilator, but the author changed their mind at the last minute when he was thinking of more chapter ideas for The Mountain King.
Miscellaneous:
The author associates the characters with the following songs: