He is a calm and confident person. In the battle against Baki, he even called himself the god of the battlefield. On the other hand, Gaia is quite unobvious character and it's hard to tell if his huge self-confidence was just pure honesty and prance or, to some extent, a play that was supposed to confuse Baki. Gaia is generally composed, but he also showed great rage when Baki managed to deal with all of his aces up his sleeve. He was a quite flirtatious tone, and is into women.