Astudent at Beacon Academy and one of the main protagonists of RWBY. Her weapon of choice is a Variant Ballistic Chain Scythe named Gambol Shroud.
She first appeared in the "Black" Trailer alongside Adam Taurus, her then-boyfriend, partner and mentor in the White Fang, a Faunus terrorist group. After leaving the organization, Blake enrolled at Beacon Academy, where she becomes a member of Team RWBY alongside Ruby Rose, Weiss Schnee and Yang Xiao Long.
Gambol Shroud has three forms. When sheathed, the weapon is able to slice opponents in two with its cleaver-like cover. However, when unsheathed, it becomes even deadlier, and Blake is able to use both the blade and sheath in tandem against her opponents.
She is also adept in using Gambol Shroud as a conduit for her Aura. Creating shock wave like attacks of varying intensities in conjunction with her swings, these attacks have been shown to be extremely effective and versatile as Blake has used them against Grimm, missiles, AK-130's and Human opponents. Given that Adam demonstrates a red variant of this attack in the "Black" Trailer, it is possible she learned this technique from him.
She also appears to be able to freely and quickly change the way she grips her weapon. She can fold the blade into a gun-blade which is attached to an extending ribbon, similar to the Japanese kusarigama or sickle-and-chain. Her technique with this form of Gambol Shroud is similar to Ruby's with Crescent Rose: she uses the recoil from the gun attached to her blade to increase the speed of her attacks and can slice multiple enemies with Gambol Shroud from the ground or in the air through a whirling attack.
Additionally, she uses the momentum of the weapon on the ribbon as an anchor to maneuver herself in midair, and she can grapple other opponents or objects from medium range to bring them into melee distance. She is quite accurate as well, for she is able to kill an Ursa with one strike during her meeting with Yang in the Emerald Forest. Though she is very talented at using Gambol Shroud offensively, it requires a lot of concentration, lowering her defensive capability and making her more susceptible to attacks overall.
Blake's most remarkable quality is her Semblance, which allows her to create Shadow-clones. Blake can use these clones to distract, shield or hide herself from the enemy for a brief amount of time, which is demonstrated during her fight with Atlesian Knight-130s and again during her fight against Roman.
Her first on-screen use of it is during the events of the "Black" Trailer when she utilized it against the Spider Droid. She can propel from her shadows, confirming there is some substance to her copies. A clone exerts a force on her, allowing her to reach greater heights.