Lilith Aensland is a succubus who was born due to Morrigan having no way to control the enormous powers that she held within. If she were to be left alone, she would destroy herself and the land around her. Belial decided to split her powers and isolate them to protect her. Morrigan's soul was split into 2; one half being closed off into a space that Belial had created.
After Belial died, the sealed off power had begun to have its own will. She, Lilith, had begun to recognize herself roughly ten years after the sealing. It was Morrigan's heart which slipped into Lilith's consciousness, although Morrigan herself never noticed this. As Lilith found about Makai, her feelings grew. These feelings were different from normal emotions like admiration and jealousy. They were closer to a primitive instinct to want to go back to its home.
Powers and Stats
Tier: At least 4-A, likely 3-C
Name: Lilith Aensland
Age: Over 300 Years Old (Same age as Morrigan, born in 1678)
Classification: Succubus, one-third of Morrigan Aensland's soul
Powers and Abilities: Superhuman Physical Characteristics, Flight, Can make her wings separate from her to form a cloud of bats, Can cross universes (Crosses from Makai to the human realm and vice-versa with no effort), Intangibility, Can absorb souls / power
Attack Potency: At least Multi-Solar System level, likely Galaxy level (Equal to Morrigan before and after the fusion)
Speed: Massively FTL+ (Comparable to Morrigan)
Lifting Strength: Unknown
Striking Strength: At least Multi-Solar System Class, likely Galactic
Durability: At least Multi-Solar System level, likely Galaxy level
Stamina: Extremely high
Range: Extended melee range normally. Interstellar with projectiles.
Standard Equipment: None notable
Weaknesses: None notable
Note: It is stated that even after Morrigan and Lilith fused to become one being, her unique mind didn't fade away, remaining functional even within Morrigan's self instead. As such, she can still leave Morrigan's body whenever she wishes to do so, although since they are now one soul, they share the same power.