The Axe Flapper is a bat-like Unversed with a thin neck and pear-shaped body that is navy blue in coloration. Its short legs, tail, and head are blue. The Axe Flapper's head resembles a hatchet or axe blade, and two large, tan wings with blue edges sprout from the sides of it. This Unversed's red eyes are set in a sorrowful expression, and its Unversed emblem appears on the front side of its body.
In Kingdom Hearts Birth by Sleep Final Mix, the Axe Flapper receives a palette swap. Its body becomes dark grey with yellow highlights, and its legs, head, and tail become pink. The Axe Flapper's wings also become pink and have light pink interiors.
The Axe Flapper's name references its axe-shaped head and the blades it throws to attack, as well as its ability to fly.
Axe Flappers are not difficult to defeat. Terra, Ventus, and Aqua need only use Guard to block their Kamaitachi attack before launching their own offensive. Alternatively, the protagonists can use Magnet to stun these Unversed.