About Kibi Kibi no Mi
The Kibi Kibi no Mi is a Paramecia-type Devil Fruit which allows the user to create "dango" from their cheeks that can tame animals and those of part-animal nature. It was eaten by Kurozumi Tama.
By pinching their cheeks while making a circle using their index finger and thumb, the user can create small, round dango dumplings, that, when fed to any animal, will make them become utterly tame and subservient to the user, obeying all their orders and defending them from harm. This technique will not cause the user's cheek any harm, and since only the user is capable of creating the dangos, they cannot be forcefully taken from their body against their will.
The dango's effect is similar to brainwashing, and though the consumer seems to retain all their memories and personality, they also gain an undying loyalty to the producer. They place the user's wellbeing and orders above all else, even their own lives. While the dangos usually are not capable of taming humans, those who have eaten functional SMILE fruits are an exception, being susceptible to being tamed due to their part-animal nature. Animals tamed with the dangos are considered "servants" (家来, kerai?) of the user, and people tamed by the ability expressly refer to the user as "Master" (ご主人様, Goshujin-sama?).