Blood Dependency. Lia needs blood to survive. Voluntary or involuntary deprivation of blood resulted in weakness (-1CS on all stats for every two days without blood) and an overwhelming desire for blood. A Psyche FEAT put off that desire for one day, but the need remained.
Direct Sunlight. The rays of the sun cause Amazing damage per round. If reduced to zero Health points, a she becomes dehydrated and turned to powder.