April O'Neil- Is a character in Teenage Mutant Ninja Turtles and is the Turtles' human friend and ally. Donatello has a crush on her.
In the series she's Jake's adoptive younger sister.
She is mentioned in Infected Part 1 where the Dark Organization plans to capture her and use her as a way to destroy Jake.
In Infected Part 2 she helps her brother, his friends, and the Turtles to free the infected Warriors of Light and later decides to move in with the team.