The "Good Guy doll" is a fictional toy featured in the horror film series Child's Play. It is designed to resemble a friendly, childlike character, complete with a striped shirt and blue overalls. The doll is marketed as a companion for children, promoting friendship and fun. In the storyline, the doll becomes infamous when it is possessed by the spirit of a serial killer named Charles Lee Ray. This transformation turns the seemingly innocent toy into a malevolent figure, leading to a series of terrifying events. The contrast between the doll's appearance and its actions is a central theme in the films.