Which characters do you consider to be most underrated?

For normal combat modes, I'd say Bistan, fives and K2SO. All three can be beasts. Low damage per atack but they all unleash an unholy number of hits per battle and can survive a good beating. All can be game changing in the right lineups.

JC gets a bad rep, and deservedly so in most modes, but he shines in fleet battles. His assist can do decent dmg, and his assist and heal can work wonders for survivability.