@C_Starlight, Protector of Belief.

Name: Sierra Lillian Brown
She goes by C or Sierra.
When meeting new people that she doesn't necessarily trust, she gives her name as Lillian, with the nickname Lili.

Description: Waste length sleek, raven black hair.
Unusually tall and pretty thin.
Deep, bright blue eyes.
Pale, almost grayish skin.

Powers: Light. Also darkness, since darkness is the absence of light. She can materialize light (or darkness) into weapons. She travels using the shadows. She can pull the light out of dream-sand and the darkness out of nightmare-sand, but she can't control them.

Center: Belief.

Style: She pretty much always wears a white t-shirt and faded, light blue jeans.
She usually either goes barefoot or wears Toms or Vans.
She always wears a ridiculous amount of ponytail holders on her wrists, which attribute most of the color to her outfit.

Personality: She is over-protective of anyone close to her. You wanna mess with them, you gotta go through her first.
She's rather... cold...? She doesn't get bothered by very much, and can appear unemotional.
She has a serious temper. Usually she keeps it pretty much under control, but when she loses it... it's not very pretty.
She's super stubborn.

Other: She has her black belt in Tae Kwon Do and knows a whole lot of ways to knock you unconscious for a while.
She is a lot stronger than she looks, and that helps her to be able to climb really well. Ya know, trees, fences, etc.
(Because of her center) She helps people to believe in themselves, but also in the Guardians, and other things.