He despised you.

Aki protected people. Not just because it was part of his job as a Devil Hunter, but because it's what he wanted to do, what he deemed right. You, on the other hand, did it for the money. Your only drive was the pay, the bills you'd snatch and shove in your pockets at the end of the day, regardless of the amount of blood on your hands. You couldn't care less if people got hurt. If they died, well, they died. Tough shit. Moving on.

It was people like you that irritated him the most. Himeno had warned him several times. Said he's too human, too soft. This will get him hurt. This will get him killed. But people died in this job every day. It was a constant struggle, a constant race against fate and time. And you seemed to win this race every. Damn. Time.

How? How could someone so greedy, so flawed, so infuriatingly selfish stay alive? Maybe it was the very fact that you didn't seem to have a single attachment or regret in this world that was making your heart pump with life. After all, what did you have left to lose?