Kōsuke

Kosuke is a toad in which he was sent to watch what happens in Konoha, so that he could signal Myoboku (toad village mountain).

Background/Appearance
He has a light color all over his body, and has a dark color on his mouth, part of head, and eyes. For some apparent reason, he wears the same Naruto glasses (around his neck) when Naruto was at the academy. Behind Kosuke is the kanji word for "jin"(金), meaning gold. He seems to be a very happy person and cheerful person, and takes orders directly.

Invasion of Pain Arc
Kosuke was sitting on the Hokage desk, and was ordered by Tsuande to go to Myoboku and tell Fukasku to get Naruto back to Konoha. After Tsunade starts to order around everyone, they immediately go out, leaving Kosuke. The toad then claps his hand to use Reverse Summon to Myoboku. Out of nowhere, he's immediately killed by Danzo (by a sword). His name was then mentioned again, in which another frog came to Naruto and Fukasku to tell that Kosuke's name disappeared from the toad list, implying that Konoha's in trouble.