The Drifting Witch of the Capital

As long as no chain of cause and effect leads to an end, there is still a chance of survival. There is always a way forward. - Lin Haiyuan

P.S. More often than not, you don't get to choose. For example, when genetic changes alter your ideal physical form while your species remains the same.

(This is a transformation-and-marriage story, so be sure to check the tags.)