I don't know what it is but Viola, ZWEI and Groh are really uninspired from a design perspective.
I dunno, they phoned it in with those concepts and they also seem like they don't fit in the universe. It's like they are more modern looking or something.
Knowing Groh's origins as a nord, they could have done so much more.
Rant aside, his gameplay and weapon style are on point especially when compared to ZWEI/Viola which seem to have styles more closer to what you see in GG/BB.
I know it would be really hard to animate but a kusari gama style would make this franchise complete, for me at least.