He is a very stoic person. He acts mature and sometimes blunt but he is actually softhearted. He had a tendency to get attached to others and is very determined. He didn't like people who do not take their job seriously. Aki is also afraid to lose those he cares about and hates Devils equally, not caring if they are Hybrids, Fiends or if they are evil by nature, to him all Devils are the same. His air of cold detachment was a facade, and he had been seen to cry over the deaths of his comrades.