Mass Effect: Ranking Every Main Squad Member In The Original Trilogy
6. Thane Krios
An assassin with a perfect memory that also had a conscience and felt bad about every kill he ever did... that he could remember in perfect detail. Thane was a contemplative character who was driven by his regrets and morals close to the end of his life.
The quiet Drell suffered from a debilitating disease known as Kepral's syndrome that would soon kill him. This added element of a ticking clock served to set him aside from every other character in the trilogy. Whereas all other squad mates are fighting for their own survival (and the greater survival of the universe), Thane is unburdened by such pressure as his fate is sealed.
All that is left for Thane is to make amends for the things he did in his prime, attempting to save his relationship with his son and doing some actual good through his work with Shepard. Thane's emotional arc of guilt and redemption comes full circle in Mass Effect 3 after he is critically injured in a fight with Kai Leng and soon succumbs to his disease in hospital. Some of the most beautiful writing in the whole series is reserved for Thane Krios.