Nakura Yuri

Yui's older sister, Nakura Yuri joined FARGO a few months ago prior to the story due to traumatic experiences. She shows cold behavior towards her younger sister to the point of denying her existence.

Spoiler

It was revealed that she was seeking the power offered by the organization to reunite her family but realized too late that it was useless for that.

Ultimately she died when the power she held in went out of control.