P'Chan
- Full Name: P'Chan
- Formerly known as Four of Nine, Secondary Adjunct of Unimatrix 01
- Species: Species 571
- Gender: Male
- By 2368: Assimilated by Borg (VOY: "Survival Instinct"; VOY Short Story: "Brief Candle")
- 2368: Forced into sub-collective with Lansor, Marika Wilkarah by Seven of Nine (VOY: "Survival Instinct")
- Death: Late January 2376 (VOY: "Survival Instinct")
- After-effects of brain damage exacerbated by disconnection of sub-collective (VOY: "Survival Instinct")