She'd like to say she wouldn't force him to do this again, but.... she might ask, if they had a worthwhile question. Maybe not this particular one. Maybe once he's got a feel for the transformations in general.

She leans over to look down, and laughs.

"You could probably do that without being a dryad." She picks up one foot and tries to shake the growth off. Hopefully not another ruined pair of shoes.

"We can see if I can get you into the lab, run a few scans. Make the most of this," she says, plucking idly at the rough texture of his arm.