Becca Lupin (user: BeccaLupin) is a young girl possessing a mysterious force known as the Xanadu Flame. She is able to transform into a Sailor Scout named Sailor Xanadu.
Super sailor xanadu by beccalupin-d39o2mi

Becca Lupin.

According to her profile, she is the daughter of the master thief, Arsene Lupin III and Fujiko Mine (from the anime, Lupin III).

Seto Kaiba (from Yu-Gi-Oh) is her cousin.

She is known to be friends with Wing Skellington (alias of user: angelthewingedcat) Kairi (from Kingdom Hearts), Bulla (from Dragon Ball Z and GT) and Dawn (from Pokemon).

In her first appearance in "Majestic Guardians", the Hey-Lin master Chase Young (from Xiaolin Showdown), who she was formerly in love with, tried to harm her to gain the Xanadu Flame.

Her love interest is Gerard Way, the lead singer of a real-life band, My Chemical Romance.

She later leads her own group known as the Robot House Gang.

She was also responsible for the death of Terrence's school principle, Robert Kelly.