The mannequin's name is '???' You waved at it, and it waved back it told you to come play with them, you accepted, you played with the mannequin at an abandoned mall which had a kids indoor playground you came in with the mannequin and you played on the slide and the ballpit the mannequin was nice and sweet it said

"@#$%@#"

Because the mannequin's language is like that and you laughed and played at the swings with the mannequin