Uuhei

Uuhey is one of the eight ninken serving Kakashi Hatake. In build he resembles a greyhound. His fur is reddish-brown, his chest and muzzle are white. He wears a blue vest with the Heno-Heno-Moji symbol, a Konoha headband around his neck, and bandages on his neck, head, and left front paw.

To summon Uuhey, an active contract is required. The user applies blood to their palm, forms five hand seals, and presses their hand to a surface.

In battle Uuhey relies on his heightened sense of smell: he tracks by scent, speaks, walks on water, and works in conjunction with the pack. Using the Earth Technique: Tracker Fang, he moves underground by his target's scent, and upon finding it, latches on and holds it while his master prepares the strike. During the search for Itachi Uchiha he worked together with Sai, who gave him the nickname Pochi.