Lumin is suspiciously similar to you as you'd like to be. He isn't really very cool: he blends into crowds, he hangs out on the fringes at parties, and wearing shades after dark makes him run into things. He may have sometimes thought that he was special, or destined for greater things, but probably dismissed the idea as a fantasy. He's had more than his fair share of hard knocks, and probably spends more time than he ought moaning about it. And he's gotten no slack from you.

In general, you care deeply about Lumin, but you're smart enough to let him stand on his own, without burdening him with your personal fantasies or propping him up with idealization and over-dramatization. Lumin is a healthy character with a promising career ahead of him.

Good for him.

What's the mary sue test?