He stops now, long enough to actually look at her, give her the full weight of his gaze. There's something ancient about him. Some people would call him an old soul. To a degree... they'd be right.
She's painfully young. A decade younger than he even looks, but she's actually thinking now. Watching. That's as good a start as any. "I could try, I suppose. It has been a long time since I taught anyone."
It's been a long time since anyone asked. He's gotten so good at cutting himself off from the world. Why is it trying to touch him again now?