Asuran

Asuran is first revealed during the Asuran's Arena Arc, where Benji and Clover enter a fighting tournament that promises an 'exotic' prize, which is only revealed to be a Rossuelan woman when the walls of the arena have shut. Asuran conquered Rossuela by himself, a country that has what are widely considered the most beautiful women in the world. They have a hair-color hierarchy system, where red is considered the lowest, and pink the highest. Asuran has made tons of money pawning off purple and pink-haired Rossuelan women, but allows those with red or orange hair to live normally.

When Clover loses in the semi-finals, Benji promises to win the woman, so he can return her home, but he ends up losing to the man placing #100 on the demon list in the finals. At the end of the Asuran's Arena Arc, he is met with Benji, who attacks, but is quickly put down. As Asuran starts to walk away from the trio, he comments on Mia's "gorgeous pink hair," and promises to keep an eye on her.

During the Rossuela arc, Asuran is greeted by a two-years-stronger Benji. The Rossuela arc is not fully planned out yet, except for a mid-arc kidnapping of Mia by Asuran.

After the events of the Rossuela arc, it's revealed that Asuran has naturally red hair, and did what he did after growing up facing poverty and ridicule.