He can summon the monsters he's allied to. She's in spiritual form right now, so she can't really speak or even properly touch. Anything she can do will be harmless. So there's nothing to worry about, even if she was hostile, which she isn't.

[Even without seeing the look on his face, he can see the signs that the other teen is overwhelmed.]

Sorry, Shoutei. It's been a bit of a roller-coaster for you today, hasn't it?