Knightelus' face isn't seen, because he has large armour all around his body. He has a visor with three rectangular holes and two flat feet that are seen only in the game over screen. He's holding a brown gun.
Knightelus was a favourite hero of his hometown, but that disturbed the king, who wanted that popularity too. He locked Knightelus in his castle and left him there to die. Knightelus then escaped and get the king to prison