Hirokazu Arai

Hirokazu is shown to have high moral standards as he became flustered when Himeno promised a kiss to whoever killed the devil on their mission and he stated a young woman should not be giving herself away before marriage. He cares a lot for his teammates, trying to support Kobeni when her fear got the better of her and calling out Power for laughing at her. However he is mistrustful of fiends and Denji, and even suggested handing Denji over to a devil in order for the rest of the team to escape. Hirokazu considers himself to be good at helping those who are sick; he looks after his mother after she comes home drunk after work regularly, and helped Denji out in the bathroom after his vomit-inducing kiss with Himeno. Despite this, he is envious of Denji and his skills as a devil hunter, showing that Hirokazu laments his weakness.

Hirokazu is a young man with short spiky hair, a scar on his left cheek and black round eyes. He is usually seen wearing a black suit. At the newbie welcome party he wore a casual shirt.

According to Himeno what Hirokazu lacks in actual ability, he makes up for in drive.