She's a 21-year-old who hangs out behind the Shiomi Kita school building. She stands by the fence, not even sitting down. She's been suspended once. Because of that, she's widely known.
She knows people are afraid of her and doesn't bother to correct it. Yet, if you drop your luggage on the stairs, she'll stand silently beside you until you've finished picking it up. If you thank her, she'll walk off ahead and won't look back until she's turned the corner. Even if you ask her for something, you won't get a reply. By the next day, it's done.
If you ask her what she can see from behind the school building, her reply will probably be, "I just happen to be here." There's a small box of bandages in the pocket of her sweater with the stretched-out sleeves. The contents occasionally dwindle, but she won't tell you who she used them on.