Peterson and eventually finds the key to the basement, and after solving some puzzles, reaches a corridor. Peterson then finds out that Nicky is watching him and throws him onto the other side of the road as he goes to lock the basement door and hide the basement key. Peterson locks Aaron in his basement, possibly to either punish him for Mya's death or to protect him from meeting his wife and daughter's fate. Peterson is seen one final time during the credits, digging a grave, most likely for Mya. Peterson motions his hand to tell her to stay and eat dinner. Peterson gets up and sends Aaron to his room, but before he leaves he takes Mya's doll. At dinner, Aaron takes Mya's spoon before pushing her and causing her plate to fall and break. He appears again to get the children for dinner, motioning his hand tiredly. Peterson became more sluggish, watching TV and appearing not to notice his daughter's concerned look for him even though she was right in front of him. Mya and Aaron hug their father to comfort him however, this wasn't enough as Mr. Peterson is seen again entering the house with his wives purse, he then lets it go before collapsing to his knees. Peterson is seen at the dinner table along with his wife and two children. Peterson plays a minor role in this game as the game focuses more on his two children, Mya and Aaron. With the losses of his beloved wife and daughter in just a short period of time, these two incidents severely crippled Mr. Not long after, Aaron accidentally pushed Mya off the roof of Mr. Peterson became anxious, waiting in the hospital until his wife eventually died in there. However, due to a horrible car accident, his wife had to be hospitalized.

He once let a younger Nicky see and befriend his son.

Peterson was once an amusement park designer and a very friendly family man who lived with his unnamed wife and his children, Mya and Aaron Peterson. He is the main antagonist of Hello Neighbor, Hello Neighbor 2, Hello Neighbor: Missing Pieces, Hello Neighbor: Walking Nightmare, Hello Neighbor: The Animated Series, and Hello Bendy (a Halloween DLC to Bendy and the Ink Machine), a minor character in Hello Neighbor: Hide and Seek, and the secondary antagonist of Secret Neighbor, and Hello Engineer.

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