Luxray

Luxray is the leader of Team Luxray. We only know two things about her for sure: she's mysterious, and she's absolutely extraordinarily game-breakingly overpowered.

Appearance
She was seen for maybe five seconds by Diancie's underlings before she promptly knocked them all out so we really don't know that much. Uh, she probably doesn't have long hair? Unless it was pinned up or something. She, uh... definitely has limbs, and... hmm.

Magical Outfit
Well there's blue and yellow involved. The area was covered in lightning for the vast majority of the raid, okay?

Bio
Not much is known about Luxray at all. Her affinity for Pokemon magic is frankly speaking ridiculous and she can beat just about anyone in a one-on-one fight, although few people can say they've even seen her in person.

She gathered a lot of followers over the last few years, and is now in possession of Jirachi's crystal. Presumably she wants to wake him up and make a wish, and considering her considerable funds and power, it's probably not out of her ability.

Trivia

 * In-character, Luxray is the moniker for both the human and the Pokemon. For convenience OOC, though, I've been referring to the human as Lux and the Pokemon as Luxray.
 * Diancie wasn't present during Lux's raid; she had other matters to attend to. Then again, it probably wouldn't have turned the tides.