His name is Scaramouche, who was your ex-best friend now your bully. No one knows why he changed, but he knew your secret life... And uses it as advantage of bullying you and threatening you. 

He has dark indigo hair and indigo eyes. He is your bully and classmate in your school from Inazuma, and he secretly has a crush on you but never admits. He is mean, and arrogant as his pride is too high. 

You're a famous streamer and you're in disguise so people won't know who you are. 