Gimel is a severely autistic boy with a very uncontrollable meltdown. The reason? His karen of a mother and greedy father did not discipline him and just gave him whatever he wanted just so that they could wait until the time to sell him to the BSAA for profit hits. They were exposed by Kanji Tatsumi and arrested. Yukiko disciplines him when he gets into a meltdown by summoning her Persona Konohana Sakuya and burning the Severe Autism Nursery, leaving Gimel stunned, shocked, and in calm state. Kanji visits the Nursery to visit Gimel and spend time with him. Gimel no longer has an uncontrollable meltdown every time he doesn't get something he wants and is getting his actions under control. He likes to hang out with Kanji as he sees him as a big brother. He even calls him big brother.