Xena

Xena the Warrior Princess, also referred to as simply Xena, is a female superhero.

History
An attendee at the Bi-Mon-Sci-Fi-Con went dressed as Xena.

Comic Book Guy had a poster of Xena in his room.

Springfield Elementary School gym teacher Brunella Pommelhorst mentions swearing oaths by Xena.

Comic Book Guy has a standee of Xena.

Xena, Warrior Princess is element Xe in Lisa's Table of Geeky Delights.

Non-canon
, who plays Xena, was captured by The Collector who was sure that she was the real Xena. However, Lawless was flying after escaping, which Xena can't do.

In Comic Book Guy's letter to Santa Claus, one of the things he wanted was the complete collection of action figures, to be delivered by. However, he said he would accept (presumably costumed as Xena) as a substitute delivery person.

Behind the Laughter
Xena is the main character in the hit sci-fi cult series, , which depicts her fighting for good during the time of Greek Mythology.