Gamaru is a young toad that is the personal summon of Kalaile Sarutobi Yuhi. He seems to be a very happy and cheerful toad, and takes any orders Kalaile gives him without hesitation. He wears goggles, a blue vest, and two black gloves with Konoha's symbol on each of them.
Kalaile often summons him to scout an area if there is water around it. She also summons him just to hang around, showing that the two have a very close friendship. Gamaru is not a very skilled fighter and normally gets in the way if he does try to. He also appears to be infatuated with Kalaile's mother, Kurenai Yuhi Sarutobi. Often asking, when he is summoned, if she is around.