Leonardo's question is one Korra's been curious about also. If she's there, then she assumed both Wan and Aang would have been selected as well; but she stands next to the turtle and listens to the answer. It kind of makes sense to her, all the Avatars were the same soul yet differed from each other in varying degrees.

She practically slides behind Leonardo at the last statement.

"What happens if someone can't balance their chi- Energy? Will they be stuck?"