Marvel vs Capcom
Lilith was a part of Morrigan. After she was seperated, she is left without a body. After fighting Jedah in Vampire Savior, they share the same body and sometimes split up. They seem to be helping in the battle againts Onslaugh.
Origin: Vampire Savior
Morrigan and Lilith wants to switch back into their own bodies.
They decide that butting heads will do it.
They are ready but...
...Zangief likes a head bashing contest.
Lilith says she wants to leave.
They fly off.
"Zangief" yells to her sister that she doesn't like this body.
Vampire Savior ending