Kinda looks like he's a giant butterfly. Or a fairy, complete with magic animal-summoning powers. Frisk looks forward quickly before their grin shows too obviously.

They plant their feet over a crack in the stones and balance right on it, sticking their arms out, 'cause they can.

"You...crashed, didn't you?" Or so they assumed. Maybe the amount of foliage scattered on the bottom of the tower was the usual amount. "You screamed pretty loud," they add.