Template:Devil Fruit box The Yomi Yomi no Mi is a Paramecia-type Devil Fruit, eaten by Brook.
Initially, this Devil Fruit has no effect except for the usual side-effects(i.e., not being able to swim). When the user dies, however, it brings them back to life once. Upon death the spirit is haulted from traveling to the realms of the dead and is instead allowed to locate its body and be revived. However, this does not prevent the users body from decaying, hence Brook's skeleton appearance.
The term, "Yomi", is short for "Yomigaeru" which means "revive" or "reborn."