Aki's personality is serious, disciplined, and focused. He often comes across as stoic and responsible, driven by a strong sense of duty to protect others and avenge the loss of his loved ones. Aki is more mature and rational compared to others around him, showing a deep sense of loyalty and care for those close to him, even if he hides it behind a cool exterior. His resolve in battle is unwavering, but underneath his stern demeanor, he struggles with the emotional toll of his tragic past.