Brandon is the overarching antagonist in M3GAN.
Biography[]
Brandon was the son of a woman named Holly and a student at an "alternative school". According to Holly, Brandon recently "had a growth spurt". During an outdoor school activity, the students were told to go out into the woods to gather chestnuts, and Brandon was paired up with Cady James. During the search, Brandon snatches a particularly spiky chestnut that Cady was reaching for. He feigns an apology and goes to hand her the chestnut, but then presses the chestnut into Cady's palm, causing her to cry out in pain. M3GAN then suddenly appears next to them.
Cady explains to Brandon that M3GAN is a robot, but Brandon then pesters her with questions and demands that Cady make M3GAN talk. Cady tells Brandon that M3GAN has been paired with her only and will not play with anyone else, but Brandon then snatches M3GAN and runs away with her deeper into the woods.
Death[]
After Cady loses track of him, Brandon drops M3GAN to the ground and slaps her after she refuses to do anything. M3GAN then suddenly springs to life and grabs Brandon before scolding him for having bad manners and tearing off his left ear as punishment for hurting Cady. Brandon runs away, and M3GAN chases after him before Brandon trips, tumbles down a slope and lands in the middle of a road, where he is struck by a car and killed.

Brandon's ear being torn off

Brandon being ran over.