Riko is teenage girl that was borned special as she plays the role of the Star Plasma Vessel in Jujutsu Kaisen. However, because of that role she takes, assassins and other sketchy organizations try to kill her.

Alastor is a tall, slim red demon. He's manipulative and powerful while also having a strange but hyper and outgoing personality. He also seems to be cocky st usual times and is so full of himself.