Quote Originally Posted by hamishspence View Post
Other D&D-verses have had them fall genuinely in love- with this being the first step in a redemption process. It's rare though.

Celia, however, is not an Alignment Subtype outsider at all- so she doesn't have the same kind of constraints. She could be thought of in a similar way to any humanoid- only difference is she's native to the Plane of Air, and her soul dissolves back into the plane after death.
Celia is somewhat akin to Hans Christian Andersen's version of "The Little Mermaid", where the Mermaid is capable of emotion, but her existence is ephemeral: once she dies her body will dissolve into sea foam. Her goal in selling her voice for legs was to try to gain a soul of her own, so that she could live on after the death of her body. In a sense, Celia is the concept of Air or Wind given an anthropomorphic form, a pair of translucent wings, and admission to law school.

Sabine on the other hand is a personification of a specific form of Chaos and Evil, namely violent seduction. Sabine is more Lawful than other Succubi, but she still has the [Chaotic] subtype; if Sabine were to become Good, she would still have the [Evil] subtype.