Julia (formerly J37 and Julia Brain) is a recurring antagonist within the Pinky and the Brain segments of the Animaniacs reboot. She is a genetically-altered laboratory mouse the ex-wife of The Brain.
Initially a well-meaning and caring mouse who disapproved of the abuse Pinky endures, she eventually becomes Brain's worst rival. Due to a malfunctioning mind controlling-device connected to her cerebrum, her personality now incorporates both Pinky's insanity and the Brain's calculating nature. She first appears in the cartoon "Mousechurian Candidate."
She is voiced by Maria Bamford.
