[His reflex is to return the bow, but he stops himself: she's clearly more comfortable with the formalities, and he doesn't want to insist on an equality that he knows isn't honest. Instead, he inclines his head, polite but not nearly as deep as Ayumu's bow.]

I'm confident you'll do well.

[Mildly, he adds:] It's a much more useful form than some. I know a shinki who becomes a staple remover.