Berial foresaw that Makai would be exposed to the crisis of perishing soon. Some great Life Form would be needed to maintain the unbalanced world of Makai. He foresaw that one with such power would not be born in the family of Aensland for another 1,200 years. Knowing this, he decided to leave the future of the Aensland family in Morrigan's hands. To Berial, the future of the Aensland family was the same as the future of Makai.
Due to Jedah's plot, Lilith was able to attain a body. In return, Lilith was to lure Morrigan and the other Darkstalkers. Morrigan's true powers were something that Jedah could not overlook. It's unknown if Lilith understood Jedah's intention and the meaning of his salvation, but Lilith enjoyed her newfound freedom. To Lilith, the Majigen was a real world that she was able to be born in. Her enjoyment will last as long as she can fight someone who can satisfy her curiosity, and to be able to somehow return to her true body. She is like a child who doesn't know the true darkness yet, but she is also a capable and dangerous seductress.
After she and Morrigan met, Lilith was finally able to return to her true self when she and Morrigan fused back together into one.