Anovadiell Tessaril by @Cacopheny (Abigail Oliver)

This is another older one, but also a favorite. Anova is an elf (obviously) and a very sickly one, at that. She has multiple auto-immune disorders, more allergies than you can shake a stick at, and a neurological disorder called NAS (don't ask me what that stands for; I don't remember). Of course, she's also one of the most influencial characters on the Matrix, the 21st century version of the internet (at least, according to the role-play I use her in ^^ ). Pretty neat, huh?