Some chick named Arachnophilia by Greg Land . Her origins per comicvine.com – Nell Ruggles is a psychopathic teenager with a history of murder. She one day went into her home room and killed her classmates with an automatic rifle. She later obtained strange powers which made her body turn red with black lines all over her like webs, and a strange webbing material leaving her body. She is first seen helping a girl from being raped by three guys, she came out of nowhere to attack them resulting in two injured and one dead.
Well, then. No wonder she looks so giddy.