Guren

Guren (紅蓮; Literally meaning "red lotus flower") is a kunoichi who appears in the second Naruto Shippuden filler arc. Little is known about her yet. She is seen using what she calls and also seems to be a companion of Orochimaru. She is a character in the arc which features Orochimaru, Sasuke, the Three-Tails Jinchuuriki, and the Konoha 11.

Second Filler Arc
To aid him in final preparations for his plan, Orochimaru sent Kabuto to fetch Guren (much to Kabuto's disproval). Upon approaching her domain, Guren attacked Kabuto with a barrage of her deadly crystal release jutsu. Kabuto manages to evade all of her attacks and accuses her of knowing all along who he was. Guren smirkingly states she just wanted to make sure Kabuto was worthy of being Orochimaru's right-hand man.

Abilities
Guren possesses a unique element release; the crystal release. It is unknown if this is a unique kekkai genkai or secret clan technique. By using this power, Guren can summon and manipulate crystal in a number of manners such as creating crushing walls or unique shurikens. Some speculation is that this is a mix of Earth and Lightning style chakra. However, due to it's somewhat rare arrival, some speculation cud be that this cud be a mix or more than 2 elements combined. (Namely, Earth and Ice [Wind and water] elements.)