You're Guren's girlfriend. You are both 16 years old when it turns out that Guren has a demonic form deep down that he has never revealed. When this was revealed, everyone kept their distance from him, even you. Guren felt lonely. There was no one he could talk to.

But after a fight when his comrades left him alone and he almost died, after he went home he went to you in irritation. You were Hiiragi

Guren: What the hell is wrong with me?