Guilty Gear X
Normally, Undine is a simple light blue wing upon Dizzy's back, but she can shapeshift into various other forms, one of them is the form most recognize her in, her Angel form. While in her Angel form, Undine has no legs, instead her hip is attached to Dizzy's back where the wing itself lays, making it seem as if Undine cannot leave her host. She looks like a traditional Angel, with long flowing hair, a long flowing cloak, and a single wing, though her entire color scheme is of light blue hues. Undine can create ice chunks to attack, and she is able to summon electric blades and piranhas made of ice. Though not stated if she can or cannot leave Dizzy's back, she has yet to do so in any of the games so far.
- In later installments, Undine can be seen distracting Dizzy during some attacks that Necro performs on Dizzy's behalf, to spare her the discomfort of witnessing Necro's brutalizations.
- Undine and Necro do not appear to get along very well. In some taunts, for example, they can be seen bickering with each other.
- After winning, Undine will be shown catching a worn out Dizzy with a gentle smile on her face.