Gamachu
is the first toad named in the series. Gamachu is a mid-level toad that first appears when Jiraiya is introduced. Gamachu is always seen wearing samurai armor in battle. When he first appeared in the manga, Gamachu seems to strike the same type of pose as Jiraiya, as he would also seem to have become the personal summon of Jiraiya.
This toad seems to be the keeper of the Toad Summoning contract scroll and unlike every other toad ever seen, Gamachu has not yet been seen talking, only quaking once or twice and mainly in the anime. In terms of appearance, the kanji on the necklace around his neck means "friendship," perhaps alluding to the fact that Jiraiya summons
him in more relaxed situations.