song that the kakashi plays may have something to do with each Seki's soul. Also, as proven in Aki's case, if the Seki has a strong connection to the kakashi, they are able to take and control the said kakashi, even if it is under the control of a different Seki. It is possible that this happened with Utao and Kyohei, when Takemikazuchi is about to destroy Kukiri. Kakashi are said to have as much power as one whole tank by itself.
List of Known KakashiEdit
Kukuri - A kakashi belonging to the Kuga clan. Its Seki is Utao Kuga. It has a knife made of a rare metal built into its right arm, and is able to redirect and amplify energy beams with its left arm. When Kyohei Kuga was its seki, it was capable of firing beams of energy from its eye and generating energy from its fists.
Uwazutsu - A kakashi belonging to the Hyuga clan, its seki is Kōshirō Hyūga. It can track its prey via smell, when it aims at something, it doesnt miss its target. However, if this target moves at the last second, Uwazutsu will just hit the ground behind/underneath it. Unlike most other kakashi, it does not appear to have many, if any moving parts.
Takemikazuchi - A kakashi belonging to the Hyuga clan. It was notably without a seki for a long time before Kirio Hyuga was chosen for the role. It can fire electrical bursts from its arm, or run a current over its entire body.
Magatsuhi - A kakashi of the Hyuga clan, its Seki is Mahiru Hyūga, the apparent heir of the family. Capable of deploying a barrier via wires that come out of its body. Any kakashi inside this barrier is unable to communicate with its Seki and is therefore powerless. It also utilises a pair of whip-like arms to battle enemies.
Amaterasu - The most powerful Kakashi of the Hyuga clan. It was believed to be one of the two kakashi permanently destroyed. It is an autonomous kakashi that does not require a seki to function, but can consume them to increase its power. A massive, quadrepedal kakashi, it does not possess the ability to fly like other kakashi, but can fire a laser from its mouth in order to combat enemies outside its range. Its signature power is the ability to self-regenerate, being able to fully repair itself after being severely damaged in battle with Kukuri.
Mikumari - A kakashi belonging to the Kuga clan.
Kagutsuchi - A kakashi belonging to the Hyuga clan.
Tokodachi - A kakashi that was destroyed sometime in the past. It is one of two that was thought permanently destroyed.