Ken Makkura

Ken Makkura (剣真っ暗, Sword, Total Darkness) is the current founder and Guild Master of the still young Dark Guild, Grey Skull, a Guild hellbent on world domination, but consists of only ten members at best. Addressed by her Guildmates as Boss (親分, Oyabun), she is the one who commands and leads them, but due to the Guild's pathetic state, both financially and power-wise, she and her Guild settled on staying with the Euryale Family, after an encounter with Amon, at their hotel, as long as they pay rent.

Trivia

 * Ken's appearance is based off of Akame from Akame ga Kill.