Do We Have This One?? Exactly What It Says on the Tin. This trope covers instances where The Chick of a Five-Man Band, or the Love Interest for The Hero turns out to be the little sister of the Big Bad, or at least of a major Antagonist. This may lead to Conflicting Loyalty, wherein the little sister must decide which side she is on, or use of a Secret Identity to keep one side or the other in the dark about the truth. This may come as a surprise to not only The Hero but also to her, as a result of being a Long-Lost Relative, or she may have been Evil All Along, acting as a spy for the Big Bad the entire time. It is more common however, that she is aware of her situation (and relation) while her comrades are not, and she is reluctant to burst their bubble. High chance that she will decide that Good Feels Good, and stick with The Hero despite family ties. Many examples may be spoilers! Needs More Examples
Examples:Anime and Manga
- The original Mobile Suit Gundam introduces Sayla Mass as a medical student eventually turned fighter pilot, only to later reveal her real identity as Artesia Som Deikun, little sister to infamous series Anti-Villain Char Aznable (who is in turn the true heir to the Zeon empire.)
- The folks at Sunrise try it again in Mobile Suit Gundam: The 08th MS Team, where Love Interest Aina Saharin, known enemy pilot (and victim of Relative Error), is really little sister to Big Bad Ginias Saharin.
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