Lisa Hallett Lisa Hallett was an employee at Torchwood Tower in London at the time of the Battle of Canary Wharf in 2007 . She was partially upgraded by the Cybermen and was hidden in the basement of Torchwood Three by Ianto Jones without anyone else knowing . Lisa ' s Cyberman reconditioning was too advanced for her to be reverted back to her original human form , and Ianto ' s refusal to accept this led to innocent casualties when Lisa escaped captivity . Biography . With Torchwood One . On 26 March 2005 , Yvonne Hartman advised Ianto Jones to ask Lisa out . ( AUDIO : " One Rule " ) Like many other Torchwood staff , Lisa was taken to be upgraded into a Cyberman . However , the Cyber - conversion process was not completed , leaving her mostly human , but with numerous cybernetic implants . Her boyfriend Ianto helped her escape the ruins of Torchwood One and took her to Cardiff . ( TV : " Cyberwoman " ) He talked Jack Harkness into hiring him at Torchwood Three . ( TV : " Fragments " ) Taking advantage of Torchwood ' s cavernous Hub headquarters in Cardiff Bay , Jones found a remote room where he kept Lisa while he surreptitiously tried to restore her full humanity . ( TV : " Cyberwoman " ) As a Cyberwoman . Dr Tanizaki , a cybernetics expert , was brought in by Ianto to attempt to help remove the Cyber - implants . Unfortunately , his efforts instead caused the implants to become fully active , largely suppressing her original personality and causing her to embark on the Cybermen ' s mission to upgrade humanity . Hallett unwittingly killed Tanizaki while trying to Cyber - convert him , and then told Ianto that her desire was to become superior , just like the Cybermen . Ultimately , she escaped her chamber in the Hub and Jack and the others learned of her existence . She killed Annie Botchwell , a Jubilee Pizza delivery girl , and transplanted her brain into Annie ' s body in a last - ditch attempt at balancing humanity with Cyber - perfection . When it became clear that Lisa ' s original personality had been irreparably corrupted and destroyed , she was killed by the other Torchwood Three personnel . ( TV : " Cyberwoman " ) Legacy . Lisa reappeared as a " spirit " who urged Ianto to open the Rift . This was merely an illusion projected to Ianto by Bilis Manger . ( TV : " End of Days " ) Later , Ianto had to endure another impersonation of Lisa during the incident at CERN in Switzerland . ( AUDIO : " Lost Souls " ) Syriath , through an illusion of Ianto Jones ' father , claimed she would resurrect Torchwood Three comrades and loved ones who had died , such as Lisa . ( AUDIO : " The House of the Dead " ) Abilities . Lisa was able to electrocute people with her hands and used a wrist - mounted blaster , much like a fully converted Cyberman . She was also much stronger than a normal human being , being able to effortlessly lift someone off the ground by the throat , throw them several feet away and even hold her own against an attacking Pterodactyl . Her armor plates granted her bulletproof durability , causing projectiles to simply ricochet . However , the exposed parts of her body were still vulnerable to being shot or stabbed with a sufficiently sharp object . ( TV : " Cyberwoman " )