T'Pol, science officer of the Enterprise, originally attached to the Enterprise by the Vulcan High Command to keep the humans out of trouble. She becomes very loyal to Archer, leaving her position in the High Command to accompany him to find the Xindi, and later joins Starfleet. A version of T'Pol who was flung into the past gives birth to the first human/Vulcan hybrid. In later seasons, she forms a romantic relationship with Trip. She also has her DNA stolen, along with Charles Tucker's, in order to make the first Vulcan/Human hybrid in the "normal"; timeline, who died from complications