Leap allows the user to leap at very high and large distances. This Quirk is not related to flight, so the user needs a foothold to jump off of. When activated, the Quirk lets her leap high, and fall without taking any damage, meaning that the Quirk acts as a cushion when activated. Falling from outside sources however, means that she will die if she falls from a high enough point.
This Quirk also requires a solid surface for it to work well. If the surface is muddy or soft, it can impact the effect of the Quirk, lessening the distance and height that the user can move.