The memories and personality of the Trill are carried forward when the Trill moves from one host to another .
After he is mortally injured , she discovers that the Trill is a symbiotic race formed when a worm - like creature is combined with a humanoid host .
The memories and personality of the race are carried forward when the race moves from one host to another .
After he is mortally injured , she discovers that the Trill is a symbiotic race formed when a worm - like creature is combined with a humanoid host .