T'Lei is the 17 year old daughter of Vulcan, Stuvik who is the Physics Specialist and "T'Kaya who speciality is Field Theory, both serve on board the Endeavour. T'Lei is good in logic, deduction, physical agility and precision of estimations. She likes humans and unlike a lot of Vulcans, does not think that humans are inferior to Vulcans. Her weakness is that she cannot make quick decisions and feels she needs to think things through, more than is really necessary. She sometimes finds things funny and has been known to slightly smile.