She's wiggling and his arms tighten as not to drop her but allow some maneuverability on her part to turn around as she wishes. It's not much effort but he'll tuck and pull on her until she's facing where she needs to go.

He looks like he's walking, even if he could run or just push himself without moving his legs, one step after another through the air, high above the raging battlefield below.

"I've noticed, compared to most magicians in this carnival, that I have a boundless energy source," he explains. His Power to Choose was always sustained. Only once, during his time with Sans in the trailer when he was at his absolute limit, did that glamour and power of his actually fail. "It astounds me really."