April O'Neil (Mutant) (IDW)

An alternate April O'Neil who came into existence when Rocksteady and Bebop disrupted the time streams in Bebop & Rocksteady Destroy Everything.

She was working at Stockgen with Lindsey Baker when both the human and mutant versions of Rocksteady and Bebop invaded the lab, demanding mutagen. April tried to sneak out with Lindsey, but was interrupted when the Turtles and Renet arrived in the lab. When Michelangelo confirmed that they were the same baby turtles April was carrying out, she nearly fainted.

She watched in disbelief as the Turtles engaged the Rocksteadys and Bebops, and entered the fray herself by attacking Scumbug, knocking its jaw off. However, she was one of the humans splashed with mutagen shortly afterwards, and began to mutate. Rocksteady caused a time portal to open behind her, dragging her and the Fugitoid away.

The time portal deposited her in the 1960s, where she fully transformed into an insect mutant. She assumed the name Nightbug, and used her abilities to become a hero, stopping evil and pursuing adventure.