Vice (バイス, Baisu) is one of the two main protagonists in Kamen Rider Revice. He is an inner demon who transforms into Kamen Rider Vice (仮面ライダーバイス, Kamen Raidā Baisu). With his host Ikki Igarashi, together they are Kamen Rider Revice (仮面ライダーリバイス, Kamen Raidā Ribaisu).