April Derp is a corrupted version of April O' Neil.
Created from the DNA of April O’Neil herself, April Derp is a monstrous version of the original. A clone “reject,” this hideous, hulking tool of the Kraang has two heads (one tiny and one large) and super-strength! Her very limited intelligence, however, is demonstrated by the single word she has in her vocabulary—“Derp!”
Her first and final appearance was in the episode, "The Kraang Conspiracy". She was a reject clone (a genetic mishap) of April made by The Kraang. She attacked the Turtles, but was soon killed due to April's telepathic powers. She was last seen exploding into a huge pile of black goo...
- On April Derp's left eye, there is a tiny head that resembles that of the real April O'Neil.
- Her left leg and right arm are horribly deformed.
- She has a mouth positioned on her back and a long tongue is within it.
- Her skin is totally palid, but in the promo image, she has a normal color of skin.
- She loves giving hugs.