Koumyou's very slight under the layers of his robes; even if Peter didn't have supernatural strength, helping him stay upright wouldn't be very hard.

"Alright, alright," Koumyou is at least agreeable to the idea, for now, and easy to lead to a chair. "Normally that wouldn't have been a problem, I promise."

Normally, Koumyou's chi reserves are such that he could have done that all day long before feeling it. But right now, they're very empty. He'd used it all on that last planet, and it doesn't refill very fast.