Corazon was formerly an Elite Officer of the Donquixote Pirates, and the biological younger brother of Donquixote Doflamingo. This makes Corazon a member of the Donquixote Family and a former World Noble. (Source: One Piece Wikia)

Senko is an 800-year-old kitsune sent from the spirit world to relieve Kuroto from his overworked and stressful life. She proudly goes above and beyond for Kuroto such as pampering him, cooking and cleaning his home. She moves in Kuroto's home and acts like a helpful wife and mother. Senko loves to pamper Kuroto such as cleaning him, massage, groom and gives him lap pillows to ensure he gets enough sleep. She gets sad if Kuroto prioritizes work over his health. To her dismay, Kuroto seems to have a fixation on her soft fluffy tail and ears. (Source: Wikipedia)