Time Lord (Exile)
From Tardis Wiki, the free Doctor Who reference
In a parallel universe, the Time Lords were a species from Gallifrey. In that universe, a Time Lord could only change a gender through regeneration if their previous incarnation committed suicide.
In this universe, the Doctor killed himself and regenerated into a new body, exiling herself on Earth. Following this, one Time Lord tracked her using a Time Ring. (AUDIO: Exile)