T.K.

TK is a mysterious character who wears a large bandanna over his eyes and tends to break out in dance every so often. No one knows his real name or past. He speaks in semi-nonsensical English phrases depending on the situation, mainly quoted from pop culture, but apparently does not know English fluently. He saves the team many times and does know some Japanese but rarely speaks it, though he seems to understand what others say to him. He carries Browning Hi-Power and LAR Grizzly handguns or a PP-19 Bizon submachine gun during missions.

Wikipedia