Jiip Stomach (ジープ・ストマック, Jīpu Sutomakku)[1] is the third son of the Stomach Family and Siita Stomach's twin brother. He and Siita were procurement managers of Stomach Inc. before being fired.[2] He later married Lizel Jaldak and changed his name to Jiip Jaldak (ジープ・ジャルダック, Jīpu Jarudakku), becoming Vice President of the company.[3] To avenge his sister, he became the third Kamen Rider Bitter Gavv (仮面ライダービターガヴ, Kamen Raidā Bitā Gavu).