Christina de Souza Lady Christina de Souza was a friend of the Tenth and Eleventh Doctor s , and had brief adventures with them both . A minor British aristocrat , she was also a thief and an adrenaline junkie . Her exploits were well - publicised — at least in Britain — allowing Rory Williams to recognise her on sight . Biography . Early life . Christina de Souza was a notorious thief who stole for thrill , rather than profit as most thieves would ; she was bored with her aristocratic upbringing . When she met the Tenth Doctor , Christina had already built a considerable reputation and was relentlessly pursued by Detective Inspector McMillan . ( TV : " Planet of the Dead " ) Meeting the Doctor . At Easter 2009 , she stole the prized Cup of Athelstan from the International Gallery in London . Her calling card ( a mechanical golden Maneki Neko waving in a mocking manner ) alerted the guards to her presence and her associate was quickly found and arrested , which concerned Christina not at all . Unable to find a way to distance herself from the museum because of the many police officers about , she used the 200 bus as an escape vehicle , bribing the driver with her diamond earrings for passage . When she met the Doctor , she dismissed him due to his odd behaviour . Once the bus was caught in a wormhole and deposited on an alien planet , she established herself as the leader of the group . She deferred to the Doctor ' s knowledge , recognising his understanding of the situation . The many tools in her backpack , which included a shovel to dig out the bus wheels , a hatchet to cut away the seats ( so they could be used as traction for the wheels ) , a mechanical winch for her heists and a hammer , proved to be of enormous value to the group . Christina became very comfortable with the Doctor and he with her . She felt a sense of adventure and excitement with him that exceeded any heist that she had ever pulled off . Against the Doctor ' s wishes , she winched down a shaft in the Tritovore s ' ship to collect the anti - gravity clamps and their power crystal , nearly electrocuting herself in her haste . She inadvertently woke an inactive alien in the ship ' s hull with her body heat . Swiftly collecting the clamps , she travelled back up the shaft with the alien at her heels . Her previous heist proved to be invaluable , as the Cup of Athelstan was made of gold . This served as a perfect conductor for the anti - gravity clamps which , by themselves , were incompatible with the bus . The Doctor mangled the cup to make it the right shape , earning Christina ' s ire . With the clamps fixed on the bus , the Doctor piloted the now flying bus through the wormhole . Upon returning to Earth , Christina kiss ed him , her earlier anger forgotten . After returning to the ground , Christina broke away from UNIT security , expecting to travel with the Doctor as a companion , only for her request to be refused , as the Doctor revealed he had been too hurt by losing his previous companions . Christina was arrested by the police and taken away . However , the Doctor used his sonic screwdriver to unlock her handcuffs . Upon realising this , Christina escaped the police car and ran to the bus , closing the door before the police could capture her again . Flying the bus to the Doctor , Christina happily told him that they " could have been so good together " . The Doctor similarly replied , " Christina , we were " , both of them smiling each other off . Christina flew the bus into the night sky , the passengers on the ground cheering her on . ( TV : " Planet of the Dead " ) Travels . Apparently Lady Christina at some point learned the Doctor ' s superphone number , as during a later adventure the Doctor answered the phone thinking it was her . ( COMIC : " Tesseract " ) Christina later met the Eleventh Doctor off - world , having obtained the ability to travel beyond Earth after raiding Henry van Statten ' s sealed vault in Utah . At the end of the encounter , the Doctor invited Christina to travel with him , but this time she declined , preferring to explore the universe on her own , later gaining a companion , Neko . ( COMIC : " The Eye of Ashaya " ) At one point in her life , Christina was caught by Adam Mitchell and trapped alongside many of the Doctor ' s other companions . ( COMIC : " Prisoners of Time " ) Christina de Souza 2 . 0 . Psychic mould from the Tenth Doctor ' s psychic paper diary grew into an identical human likeness of Christina with the same name , but her personality also had spores of many other individuals from the Doctor ' s memories . The Doctor referred to her as Christina de Souza 2 . 0 and told her that she should keep the name because as a thief , Lady Christina could hardly be upset with her for stealing it . ( PROSE : " Keeping up with the Joneses " ) Personality . Christina was fiercely independent and enjoyed defying the Doctor ' s wishes . She was an expert thief , but only stole for the adrenaline rush . She was bored by her aristocratic life and had a high opinion of herself . She used her obvious charms and good looks to win people over , often for selfish reasons . She showed great enthusiasm for joining the Doctor on his travels , but quickly forgave him when he refused . She could also speak French fluently , which amused the Doctor . She had an untrustworthy streak in her ; she abandoned her partner in crime , who was probably also her lover , when he was caught by guards during her escape from the museum . Despite that , she was kind enough to give the cup over to save lives , though also to save her . She was also mischievous , and took the opportunity to mock the police as she made her escape in the flying 200 bus . ( TV : " Planet of the Dead " )