P'Chan (Borg designation: Four of Nine, Secondary Adjunct of Unimatrix 01) was a humanoid former Borg drone. He had belonged to the same unimatrix as the Human former drone Seven of Nine of the Federation starship USS Voyager. Prior to his assimilation he was a member of a race designated by the Borg as Species 571. His parents – mother Ansha and father Dornar – were killed in the Borg raid where P'Chan was assimilated.