Sakiyu grew up in a very sexual environment. People around her had public s*x wherever, and she got abused quite often. When she went into high school, people flirted and harassed her. In her last two years of high school, she became numb to any feeling except love and lust. She used her lack of feeling to her advantage and harmed anyone who flirted of harassed her, tired of allowing herself to take it all and not fight back. She left high school being feared by everyone. An assassin league named Red Eyes took her in. Being rivals of the leagues Nightmares, Traitors, and Blood Painters, the league got attacked quite often. Sakiyu used her lust and enticement much like she had done beforehand, seducing male members before killing them. She felt no sorrow, no remorse, no nothing. She died with a headshot in one of the attacks to her league's base.