Toshiko Sato
From Tardis Wiki, the free Doctor Who reference
Beautiful, brilliant, yet insecure, much of Toshs' private life remains a mystery, although it's known she has living family with whom she maintains a close relationship.
Despite her crush on Owen Harper, Tosh is known to have had a sexual affair with a female alien who tried to use their relationship to gain access to her technology, confiscated and by Torchwood.
