Keido Corporation, also known as KeidoCorp, in short, is a mafia organization that appears in the Keido Arc. They first appeared when the economy in Studdton broke down as KeidoCorp took over the economy, replacing most restaurants with their own, which only serves pizza as the main dish.
It was stated in a conversation between Reggie Pereskia and Team Dimensionia that KeidoCorp is a foreign company. This could explain why all KeidoCorp characters have a unique face. Some characters, such as Winchester and Etaleo, share the same face. These characters may have roots from the Keido land.