Blake is a Faunus, a human with animal traits. Unfortunately for her, Faunus are under discrimination by the humans. As a kid, Blake joined a group called the White Fang, a Faunus group who claimed they were going to stop the discrimination. However, they planned to do that through fear, by getting the humans to be afraid of the White Fang. Once Blake figured out what the White Fang was doing, she defected from them and decided to go to Beacon Academy and become a Huntress. While there, she was grouped up with Ruby Rose, Weiss Schnee, and Yang Xiao Long, the four girls becoming Team RWBY.
Aura: Aura is the manifestation of one's soul, and can be used for many purposes in battle. It can act as a force field to defend the user against attacks, send out shockwaves, and heal minor injuries.
Semblance: The innate, personal power of a person that manifests as a different ability for each person. Blake's Semblance lets her create shadow clones. Blake uses these clones as distractions, shields to take blows for her, and platforms to jump off of.
Enhanced Senses: As a Faunus, Blake has night vision and enhanced hearing.
Gambol Shroud: Gambol Shroud is Blake's signature weapon. It consists of a katana, a sheath that doubles as a cleaver, and a pistol with a blade on it and a ribbon tied around the handle, letting her use it as a chain scythe. When enhanced with Aura, Gambol Shroud can slice through metal with ease, and Blake can use the recoil from her pistol shots to propel herself in different directions.
Dust: Dust is a source of energy that is activated by Aura. By loading Gambol Shroud with Dust, Blake can give her shadow clones different elemental properties. Fire Dust creates clones that explode on contact, Ice Dust creates icy clones that freeze foes who touch them, and Earth Dust creates a stone statue of Blake that can be used as a shield.