After revealing that Vergil has three holes in his heart, Hollow Vergil sends him to a hellish facsimile of Limbo City. He eventually comes across "Kat" being chased by an Imprisoner. Vergill manages to dispatch the demon just after it corners her, however "Kat" reveals herself that she's a demon and starts to mocks Vergil, telling him she chose Dante over him. In a rage, Vergil kills her. After Hollow Kat dies, Hollow Vergil tells Vergil that one of the holes in his heart has been filled.
Devil May Cry 2