Lie Ren

Lie Ren, more commonly referred to by his surname Ren, is a Huntsman, a former student at the now-defunct Beacon Academy, a member of the now inactive Team RNJR and one of the remaining members of Team JNPR. His weapons of choice are a pair of green, fully automatic pistols with sickle-like blades attached vertically under the barrels, named StormFlower.

(Source: RWBY Wiki)