Aswang is a new unit that is introduced in Metal Slug Attack.
A self proclaimed "vampire", Aswang frequented a certain town with her bat familiars in tow.
One day, she encountered Vatn, who was hired by the town to drive her out. Vatn severely wounded her with silver bullets (causing her to become allergic to metal in the process), though she survived. She is searching for Vatn so that she can exact revenge on him.
The exact reason for this is revealed in her story, where she was in a relationship with Vatn; however, because she charmed him into bringing her a town's worth of villagers for to feed on, Vatn eventually regretted it and vowed to never let it happen again. This caused him to severely wound her, though he had believed her to be dead. Caroline claims that she changed her ways, only feeding in self-defense and taking very little now.
- Her name was derived from the shapeshifting monster in Filipino folktale with the same name usually possessing a combination of the traits of either a vampire, a ghoul, a warlock/witch, or different species of werebeast, or even all of them together.
- She bears a resemblance to Eliza from Tekken series.