Airen
[08] Mercenary
IIRC, Viola's SET 3B is -14 on block, so you can do a 4B or 3KK to punish instead of just AA, all depending on range, but I don't remember the range on her 3B being all that great anyway, so you could either use 4B or A:6 to punish for better damage than 3KK or AA.