Fuen

is a kunoichi that appears in the first filler arc of Shippūden, she is part of the group of grave robbers who have dug up four of the dead Twelve Guardian Ninja. She is the strategist and trap expert of the group and is widely thought of as the weakest member of the team.

Personality
Fuen is portrayed as having a superiority-complex. As a strategizing expert, she has a high opinion of her intellect and skills. She is easily bored in battle and gets enjoyment when an opponent can prove themselves capable of surviving the initial strike of her strategy. This was shown from how she had hoped to face Sai again after he out-maneuvered her.

Fire Temple arc
Fuen was first seen with Fudo searching for the graves of the lightning-chakra users of the Twelve Guardian Ninja.

She later made her next appearance again Team Yamato where she took advantage of Fudo's powerful earth-based jutsu. Utilizing her unique terrain-altering jutsu, she turned the entire battlefield into a giant maze of traps that kept Team Yamato barely survived.

During the invasion of Konoha, Fuen ensured that no Leaf Village member could escape by summoning a giant barrier around the village. After their plan was discovered, Fuen went of to stop anyone from interfering and came across Sakura.

Fuen managed to trap Sakura in a small rock cave, where she then performed a genjutsu with poisonous moths all over the cave. When Fuen stops the illusion and looks at the unconscious Sakura, before stabbing her. Sakura turns out to be a substitution, and the real Sakura appears behind Fuen and punches her through trees, immobilizing her body. Sakura then ridicules Fuen for not being aware of her own limitations in battle and finishes her off by hitting Fuen into the ground with her immense strength, creating a giant crater into the ground and deactivating the barrier around Konoha.

Abilities
Fuen's specializes in indirect and misdirection tactics. Her most noticeable abilities allow her to draw certain things on her map, and manipulate any terrain she wants. These terrains cannot be returned to normal, unless she were to die, rolls up her map, or move to a different location. She also very skilled in genjutsu and poisons as well. She is able to combine the two, and cause a genjutsu paralysis on the opponent making it double deadly. Her final ability is to perform powerful sealing jutsu as demonstrated with her Five Point Seal Barrier: Hachi's Gate. As she relies more on deception and attacking from a far, her close-range combat abilities are rather weak.

Trivia

 * Naruto fans on forums suggested Fuen was a transvestite. This was based on Fuen's male-looking face, her seiyu being a man, and thick hands.