oohohohoho, this is a good one. gemma is an extremely fun and capable character in srb2, allowing for stupidly large extra height, maneuverability, enemy killing and even busting floors. she, for better or for worse, fits right in with the main cast, even if it means shoving in a spindash for her spin move. that may be slightly underwhelming, but because the mod is so fun with just the jump ability, it's barely an issue to begin with.
i 100% recommend this, such a fun character mod. among all of the alternate universe gemmas ralph has created, this is the best one.