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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).
History

Siita and Jiip as they watched Shoma and Michiru.
When he and his sister Siita were younger, they celebrated their birthday alongside their older siblings but was short-lived when they returned to work, leaving the two alone. Their younger half-brother, Shoma, who was also young at the time, later attempted to celebrate their birthday by offering them a flower each. But both Jiip and Siita cruelly stomped on Shoma's gift in front of him while telling him to go away. In truth, the twins were envious of the attention their younger half-brother Shoma got from his human mother Michiru Inoue and their father Bouche, who ignored their attempts to get his attention. Since then, the two made a promise to stay together, no matter what happens.
After Bouche died and his older brother Lango became the new president of Stomach Inc., Jiip joined his twin sister and their older siblings to have Michiru and Shoma be made into Human Presses and be processed into Dark Snacks. But Shoma's hybrid physiology saves him as he later escapes to the human world.
Siita and Jiip were made aware of the Granute Hound's disappearance by one of their Agents, but chose not to inform the rest of the family and instead investigate themselves. They would later discover the culprit for their disappearing part-timers to be Shoma and attempt to get rid of him like before, but their Agents were overwhelmed by Kamen Rider Gavv's Fuwamallow form.
During a meeting where their older sister, Glotta, reported her encounter with Kamen Rider Valen, they accidentally reveal their previous encounter with Shoma to the family and Lango fired them instantly, for not reporting it and for their incompetence. Wanting to prove their value and keep their procurement positions at the company, the twins gave Lango a proposal that they can increase Human Press sourcing within ten days. During Halloween, they attempted to get rid of Shoma again but failed due to the former as Kamen Rider Gavv overwhelming them using Gurucan form.
Failing to meet their set deadline, the twins were permanently fired with Lango planning on marrying them off ideal families for Stomach Inc. to garner influence from Granute high society.
Losing Siita
Fearing that they'll eventually be separated once they're both married off, he and Siita escaped into the human world while failing to realize that they could not use their company's resources. The twins blame Shoma for their repeated misfortune and decide to personally kill him. Using Granute Rojoe to gain his attention and using Siita's Agent to lure him out to a cliffside, he and Siita fought Kamen Rider Gavv personally in their Granute forms and ultimately won with Shoma being pushed off the cliff by their attack. Knowing there was a possibility that he could've survived, the two used their Agents to search for him.
When their Agents returned empty-handed, they created a new plan to lure the still weakened Shoma out by having their Agents attack humans and leave message written in the Granute language for Shoma to meet Siita and Jiip at a warehouse to prevent further causalities. Once he arrived, the two blamed Shoma for their misery and separation and fought, but were overwhelmed when Gavv first transformed into Caking form.
Before Gavv's Caking Breaking would hit the two, Siita pushed Jiip out of the attack's course, sacrificing her life so that he could live. He retrieved his sister's broken Mimic Key and Scepter and left as he began to break down in grief over her death. Sometime later, he began experiencing a mental breakdown and cut the black side of his hair to mimic his sister. Not wishing to face Lango, a semi-catatonic Jiip remained on earth and provided one of his Agents to assist the Granute Rojoe who attempted to bring Shoma to him.
Marrying Lizel & Revenge Towards Stomachs
When that failed, he eventually returned to the Granute World and wandered the streets for a time and eventually considered suicide. But he instead met Lizel Jaldak, the sole daughter of the Granute World's president, Bocca Jaldak. Jiip, motivated by his desire of revenge towards his remaining siblings, marries into the Jaldak family and provides Bocca with intel on his family's business to justify the president exercising his authority to give Jiip and Lizel control over the company.
Personality
In contrast to his more masculine sister, he refers to himself with the typical feminine pronoun 私 (watashi). He also fluctuates between speaking individually and speaking in unison with his sister.
With Siita's demise at the hands of Gavv, Jiip seemingly suffers a mental breakdown and cuts the black portion of his hair to mimic her. He grew depressed, only focusing on his ongoing revenge against Shoma. When Granute Rojoe captured Hanto and presented him to Jiip, he only coldly replies "He's not the Red Gavv" before leaving.
Thanks to meeting Lizel, Jiip returned to a more stable state and is now bent on ruining his family and killing Shoma to avenge Siita. However, after witnessing Lango's death at the hands of Shoma, Jiip's mental breakdown returns even adding a nightmare of Siita, being scared of Glotta despite his higher position in the company and even losing his calm self and whining when fighting Shoma. Later, his mental breakdown increases more when Nyelv suggests modifying his gavv into the Bitter Gavv. When he refused to lower himself as he sees in Shoma until Lizel encourages him to be brave. After the surgery, he claims he has "thrown everything" just to kill Shoma.
Powers and Abilities
- Human Disguise: By inserting a Mimic Key into his Mimicdeviser, Jiip can adopt a human form. He is able to return to his original form by removing the Mimic Key.
- Enhanced Strength: Even in human form, Jiip possesses sufficient strength to fracture a wall with Siita.
- Agent Creation: Jiip is capable of spawning Agents from his gavv.
Forms

Jiip Stomach
- Statistics
- Height: 196.1 cm
- Weight: 58.5 kg
- Arsenal
- Knives: Jiip carries a tool similar to a scepter like his siblings, and his transforms into a machete-styled long knife. The lower half of the hilt can be removed to reveal a smaller dagger, allowing for surprise attacks or dual wielding. Both of the blades can create electrified blue energy slashes, which can also be launched as projectiles.
- Abilities
- Synchronized Movement: Jiip's coordinated attacks with Siita demonstrate a high degree of synchronization, leaving the target no chance to counterattack.
- Agility: Jiip is highly agile, enabling him to rush the opponent, dodge attacks, jump between surfaces, and move at high speeds while leaving a trail of electricity.

Bakibakistick Form
- "Bakibakistick! Yummy!"
- ―Transformation announcement[src]
- Rider Height: 196.6 cm
- Rider Weight: 64.2 kg
- Ability Parameters[4]
- Punching Power: 2.7 t
- Kicking Power: 6.6 t
- Maximum Jump Height: 7.5 m
- Maximum Running Speed: 100 m per 6.0 seconds
Bakibakistick Form (バキバキスティックフォーム, Bakibakisutikku Fōmu) is Bitter Gavv's potato stick-based form accessed by using a Bakibakistick Gochizo in the Henshin Belt Bitter Gavv.
In this form, Bitter Gavv wields the Bakemagnum in addition to the Bitter Gavvgablade. His physical strength is the exact same as Breacookie Form, but out of the three forms of Bitter Gavv, Bakibakistick Form is the lightest and the most nimble. Bakibakistick form can also utilize the potato sticks comprising the form's armor as weapons, with Bitter Gavv capable of using them to impale enemies caught in their path.
Bakibakistick Form consists of the following parts:
- Bakibakistick Alterhead (バキバキスティックオルタヘッド, Bakibakisutikku Orutaheddo): The head.
- Bakibakistick Mug (バキバキスティックマグ, Bakibakisutikku Magu): The face. The biological tissue generated by using Bakibakistick Gochizo is tough against impacts in the direction of its long sides, but is fragile when it comes to impacts from its short side. Taking advantage of these opposing properties, the layered arrangement acts like a reactive armor, offsetting the impact by deliberately destroying the surface.
- Bakibakistick Rage Eye (バキバキスティックレイジアイ, Bakibakisutikku Reiji Ai): The eyes. The slit structure provides high protection and improved vision and by adjusting the incoming light it is also possible to block strong light.
- Gradnal (グラドナル, Guradonaru): The recording organ. The special crystalline structure also has neurotransmission-assisting functions that amplify the functions of each body part during combat and enable smooth links with weapons and other items.
- Bitbady (ビットバディ, Bittobadi): The body. The transformer's body transforms and changes by distorting the characteristics of Gochizo, exhibiting partially outstanding powers.
- Bakibakistick Sternum (バキバキスティックスターナム, Bakibakisutikku Sutānamu): The chest. The biological tissue generated by using Bakibakistick Gochizo is tough against impacts in the direction of its long sides, but is fragile when it comes to impacts from its short side. Taking advantage of these opposing properties, the layered arrangement acts like a reactive armor, offsetting the impact by deliberately destroying the surface. It can also be used as a weapon by transforming pieces of the biological tissue into rod shapes.
- Bakibakistick Alterarm (バキバキスティックオルタアーム, Bakibakisutikku Orutaāmu): The arms. By aligning his biological tissue in the direction of the strike, he strengthens the power of his punches, and is adept at rush attacks that make the most of the speed that comes from his extremely lightweight skeletal structure.
- Bakibakistick Alterleg (バキバキスティックオルタレッグ, Bakibakisutikku Orutareggu): The legs. By aligning his biological tissue in the direction of the strike, he strengthens the power of his kicks, and is adept at rush attacks that make the most of the speed that comes from his extremely lightweight skeletal structure.
This form has the following finishers:
- Henshin Belt Bitter Gavv finisher:
- Bakibakistick End (バキバキスティックエンド, Bakibakisutikku Endo): Bitter Gavv jumps into the air, and unleashes a roundhouse rider kick that destroys the enemy.
Equipment
Devices
- Henshin Belt Bitter Gavv - Transformation organ/belt
- Gochizo - Transformation trinkets
- Gochizo Holder - Carrier for a single Gochizo
- Mimicdeviser - Transformation device
- Mimic Keys - Transformation trinket, inserted into his gavv to take human form.
Weapons
- Bitter Gavvgablade - Main weapon
- Bakemagnum - Secondary main weapon
Relationships
Family
Wife
Father-in-law
Paternal grandfather (deceased)
Father (deceased)
Eldest brother (estranged)
Elder brother
Younger half-brother (estranged)
- Siita Stomach: He is close to his twin to the point where they can't act without the other, the two generally acting as if they're a single person. As such, Jiip took Siita's sacrifice hard and blamed all his siblings for his sister's death.
- Jaldak Family
- Bocca Jaldak: Jiip saw his father-in-law as an effective means to get revenge on his siblings, revealing the inner workings of Stomach Inc. to Bocca.
- Lizel Jaldak: Jiip was intially hesitant around Lizel, but he opens up to his future wife and lets her make most of the decisions in their relationship. Lizel, in return, greatly cares for Jiip and is perfectly willing to protect her husband at all costs.
Enemies
- Shoma/Kamen Rider Gavv: He and Siita loathed Shoma and considered him as a half-breed weakling unable to produce Agents, being indifferent to him destroying their part-timers before witnessing him personally destroy their agents. The twins since avoid direct confrontations while not informing their older siblings of Shoma, resulting in them being fired for their incompetence and keeping that vital information to themselves. Once he and Siita are fired from Stomach Inc, and expelled from the Stomach Family, they blame Shoma for their misery. After Siita sacrifices herself to force him out on path of Shoma's attack, Jiip came to further loathe his half-brother and eventually declared war on him as a member of the Jaldak family.
- Hanto Karakida/Kamen Rider Valen: He doesn't care much for the human when Granute Rojoe captured him instead of Shoma.
- Rakia Amarga/Kamen Rider Vram: to be added
- Sachika Amane: to be added
- Stomach Family
- Lango Stomach: He is afraid of Lango, who later fired him and his sister for their incompetence in keeping their older siblings in the dark about Shoma disrupting their work. He blames Lango for Siita's death, conspiring with the Jaldak Family to remove his brother as president of Stomach Inc, but then he regrets his seeming death at the hands of Shoma.
- Glotta Stomach: He is afraid of Glotta, was quick to point out his failure realizing Valen’s existence.
- Nyelv Stomach: He is not shown to be intimidated by him like with his other siblings, thought Nyelv refused to help him, favoring his own interest.
- Bouche Stomach: Despite being their father, he was an unloving and distant parent to them, even ignoring them on their birthday. After he passes away, Jiip and Siita are both shown to be gleeful about his death.
Behind the Scenes
Portrayal
- Jiip Stomach is portrayed by Ruito Koga (古賀 瑠, Koga Ruito). As a child, he is portrayed by Fuma Kusunoki (楠 楓馬, Kusunoki Fūma). While taking on Siita's form, he is briefly portrayed by Honoka Kawasaki (川﨑 帆々花, Kawasaki Honoka).
- In his Granute Form and as Bitter Gavv, his suit actor is Kazuma Sakai (酒井 和真, Sakai Kazuma).
Etymology
- Jiip's name is derived from the Hindi word जीभ (jībh), meaning "tongue".
Notes
- Bitter Gavv Bakibakistick Form was first revealed alongside the DX Bitter Gavvgablade, which was released four months before the form's official debut in the show.

- Notably, the packaging initially depicted Bakibakistick Form with purple eyes much like Sparkingummy Form, rather than Jiip's blue.
- Like Magen, Jiip wields the Bitter Gavvgablade with a reverse grip.
Appearances
Kamen Rider Gavv
- Episode 1: A Snack Kamen Rider!? (flashback)
- Episode 2: Happy Zakuzakuchips
- Episode 3: Soda Punch Is a Guilty Pleasure
- Episode 4: More Marshmallows Please!
- Episode 5: The Memories Are Painful
- Episode 6: Transformation Is Bitter Chocolate
- Episode 7: What Flavor Lies Beneath the Mask
- Episode 8: Dual Chocolate
- Episode 9: Trick or Dance!
- Episode 10: Extra Large! Candy Cannon!
- Episode 11: Beware of Sweet Words!
- Episode 12: A Bond Connected by Doughnuts
- Episode 13: Promised Homemade Cake
- Episode 14: Miraculous Awakening! Caking
- Episode 15: Escaped Granute!
- Episode 16: The Gift of Noël
- Episode 29: Jiip's Surprise Wedding!
- Episode 30: The Most Terrible Presidential Daughter
- Episode 31: A Difficult Marriage
- Episode 34: The Great 100 Gochizo Operation!
- Episode 35: Zero Sweetness! Ironclad Lango
- Episode 36: Turnaround! Awakening! Master Gavv
- Episode 37: I Have Never Forgotten
- Episode 38: The Other Side of Hatred
- Episode 39: I've Been Looking for You
- Episode 41: Glasses Creeping Closer
- Episode 42: At the End of Broken Feelings
- Episode 43: What Does the Human World Taste Like?
References
- ↑ https://www.tv-asahi.co.jp/gavv/enemy/?index=0011
- ↑ https://www.tv-asahi.co.jp/gavv/cast/
- ↑ https://www.kamen-rider-official.com/uploads/gavv_summary/digest_image1/35/140f5653-2b54-4bee-8f11-44ec97932abf.jpg
- ↑ 4.0 4.1 "TV Asahi's page for Bitter Gavv Bakibakistick Form". https://www.tv-asahi.co.jp/gavv/rider/b-gavv/bakibakistick/.