A cold and emotionless Bakugan, Zacharias is very uncaring to other beings, including Bakugan such as his siblings. He is extremely patient and is full of vast knowledge and wisdom. Zacharias is also seen to be uncaring when someone is in need of help, for he believes that they can escape whatever peril they are in by themselves. Despite being the most ruthless of his siblings, his authority can even be undermined by his older brother Celestial.
Being Celestial's closet sibling, Zacharias knows nearly of all his secrets and sins, even those unknown to Octavius. Zacharias is also seen giving his older brother advice, and sharing his own secrets with him. The two are very close as the brothers they are, and can get competitive in almost any challenge, including brawling. Despite the fact that Celestial is far more powerful than Zacharias, Zacharias evens the score by beating Celestial at puzzles and other "mind games", things that Celestial highly detests. They maintain a strong, brotherly relationship and make an excellent tag team.