O-Tama is a girl from the region of Kuri in Wano Country. She is a kasa weaver and a kunoichi in training who follows the Kozuki Family.
Tama has eaten an unnamed Paramecia-type Devil Fruit that allows her to create food from her body. By forming a circle with her thumb and index finger and pinching her cheek, Tama creates a small dumpling, which seems to have a pacifying effect on animals that eat it, making them tame and friendly.
It was first used to tame Hihimaru. The food is capable of taming animals but does not typically work on humans, both in quelling hunger and taming. However, humans who have consumed a SMILE Devil Fruit are susceptible to being tamed by the food due to being part animal; it is unknown if this also applies to normal Zoan users.
Her Devil Fruit power seems to be based on Momotarō of Japanese folklore, who also used kibi dango to recruit his three beastly retainers: a dog, a monkey, and a pheasant. So far, Tama is known to have befriended two of the same three types of animals that Momotarō has; only the pheasant is missing.
The way Tama uses her Devil Fruit is reminiscent of the old Japanese tale Lump-removing Old Man, a tale in which an old man befriends ogres who then removes a lump on his right cheek.