The party hostess, Shiloh, wore a complicated costume. She was dressed as a Post-Humanist, after several rounds of inter-species reproduction have occurred, that studies inter-species sexuality. Here are some pictures of her festooned.
The 11-year old I live with chose to go to the party as herself but as if she'd been raised by Shiloh. Remarkably, with that persona in mind, the 11-year old and Shiloh both chose to wear orange bob-shaped wigs without any consultation on the matter. They were both incredibly pleased by the lucky commonality.
Pics of the 11-year old.