Lyekka is a carnivorous plant in the form of a beautiful girl from Stanley Tweedle's past, who has joined the crew of the Lexx. Lyekka genuinely cares for Stanley and will not eat him or people whom he asks her to not eat. She even reincarnated Xev from the bodily remains of Zev in order to to please Stanley.
Lyekka is not a bad person, she just needs animal protein to survive. If it moves, it's food.