You don't have to tell me.... I've been on the receiving end of those Ass whoopings numerous times now..... you gotta love those Falling Crumple Stuns.
I really do suspect that NyoTengu's a sleeper character. Hell, majority of the "lower-Tier" characters in DOA are sleepers.
A character which hasn't yet been fully discovered its fullest potential and/or characters which are underestimated.