hmm, can't tell if Crisis is trolling or not... ah well, the game is either a lot of fun or a lot of frustration with its design.
Anyways, my main is Richter because of all of his moves that I can use to help the team run faster (like the tackle to dash past armors to reach a switch, or reaching past a long hallway to a chest/switch that characters without Shanoa/Julius can't reach). Also, his dive kick works a little better from what I've seen; seeing Alucard's dive kick for example he kicks down but its not straight down which can end with being hit, but thats just a nit pick. Lastly its satisfying chaining the spin kick with the whip, or even whip + spin kick + tackle.
His speed (via slide jump), ability to combo, invincibility frames, and (most importantly) because I started from Rondo of Blood as a castlevania fan; all that sums up why I use Richter all the time.