Denka

is a ninja cat that lives with Nekobaa at an Uchiha supply base. Suigetsu mistakes him for a tanuki. His senses are sharp; he senses Sasuke's chakra and remembers him in spite of spending years apart.

Trivia

 * Hina and Denka are actual names of cats that are owned by Naruto's voice actress, Junko Takeuchi.
 * Junko Takeuchi also voiced Hina, while Denka was voiced by Kazuhiko Inoue, who also voiced Kakashi. The same goes in the English dub with Naruto and Kakashi's voice actors.