- "Please rule the Yo-kai World with the Princess. I am happy that I am able to give this life for my lord."
- —Voidera's last words, Yo-kai Watch Shadowside episode 43
Voidera (Japanese: 洞潔 Dōketsu) is an Rank S Yo-kai of the Oni tribe. He is known in his human disguise as Ganryuu Shimanouchi (Japanese: 島之内厳流 Shimanouchi Ganryū).
In Yo-kai Watch: Wibble Wobble, he's a Rank SSS Yo-kai of the Tough tribe. He also has the Shinma-inspirited form called Shinma Douketsu (Japanese: 真魔洞潔 Shinma Dōketsu).
Appearances
Video games
- Yo-kai Watch 4: Boss and Playable Yo-kai
- Yo-kai Watch: Wibble Wobble: Playable Yo-kai
Anime series
- Yo-kai Watch Shadowside: The Return of the Oni King: Cameo Yo-kai
- Yo-kai Watch Shadowside: Antagonist Yo-kai
Biology

As Ganryuu Shimanouchi, he is a young man with short, black hair, and half-closed, olive-colored eyes (making his face slightly resemble that of Dandoodle from the original series).
He wears a black shirt and light-colored pants. The shirt has a pocket with blue and red pens in it and an eye-like symbol underneath.
As Voidera, he is mostly black with fiery hair with gradients of purple and violet. Between his orange eyebrows, he has a green amulet. However, this appears as an eye with a green iris and a golden sclera from time to time. He has flowing hair on his arms and a white mane of white hair on his chest, he also has a small and almost unnoticeable tail.
He wears black sack-like pants with white clouds around the bottom and is tied together by a dull gold waistband around them.
Voidera previously wielded the Wildfire Brand.
Personality
Voidera is extremely loyal, following Shutendoji even when he ignored his warnings about Isabelle. It is implied that his teacher persona is more than just an act, as he appears to genuinely care about the well-being of his students. His caring nature does not extend to Fukurou and Bruno, as he constantly berates the former for failing orders, and calls the latter a piglet almost every time they meet.
Profile
Yo-kai Watch 4
Voidera can be befriended through Quest 041 post-game. You can find Theo at the Arihoshi shrine; talking to him will start the quest. The player needs to travel to the second floor of Houkendan and find a newly revealed chest near the rocks next to the stairs in the south-west chamber. Once the player strategically obtains the Genbu Gun, they need to play through the series of memories and then fight Shinma Douketsu. He is a strong enemy so a team of Lvl. 50+ Yo-kai is recommened. Once defeated, he will give the player his ark.
Game data
Yo-kai Watch 4
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PuraPura Blasters
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Yo-kai Watch: Wibble Wobble
Voidera
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Shinma Douketsu
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Quotes
In the anime
Yo-kai Watch Shadowside: The Return of the Oni King
Voidera appears briefly in the post-credits scene of Yo-kai Watch Shadowside: The Return of the Oni King, alongside his master, Shutendoji. He notifies Shutendoji about Rasen's defeat and Shutendoji is disappointed that someone named "The Princess" didn't make an appearance. He was holding the Wildfire Brand at the time.
Yo-kai Watch Shadowside
Ganryuu Shimanouchi works as Summer's teacher.
At the end of SS001, he introduces Theo to his class.
In SS004 it is revealed that he secretly works together with Theo and Fukurou, looking for the one they call "princess", and in SS005 it is revealed that Ganryuu is capable of transforming into Voidera.
In SS012, Voidera stalls Summer and Bruno while Theo steals the Stormweaver. When Theo obtains it, Voidera leaves.
In SS013, it is revealed that Voidera currently wields one of the five Sacred Swords.
In SS014, he monitors Fukurou's fight with the detective agency. After Fukurou's defeat, he attempts to retrieve the Stormweaver, but not before berating Fukurou for disobeying orders and telling him that both he and Shutendoji have lost faith in him, which results in his despair reaching rock-bottom and causing him to transform into Shinmagunshin Fukurou. He attempts to fight him, but his power is no match for the now monstrous Fukurou. After Fukurou is defeated, he is shown discussing the event with Shutendoji.
In SS021, Voidera fights against Suzaku in his Celestial form, badly injuring Suzaku.
In SS030, Ganryuu's identity as Voidera is finally revealed to the detective agency.
In SS037, he follows Shutendoji's plot to steal Cole's Sacred Sword so that they can awaken The Princess before Overseer finds her. Everything seems going according to plan until Overseer appears and quickly defeats Voidera and Shutendoji. During the battle, Summer uses a mysterious power to easily defeat Overseer.
In the aftermath, Voidera reverts to Ganryuu and kneels before Summer alongside Shutendoji. They claim that she is the reincarnation of The Princess that they have been looking for and will follow her orders without hesitation. Despite her refusal to work with them, Ganryuu smiles satisfied because they have finally found The Princess, thinking to himself that this is just the beginning.
In SS038, he is seen walking alongside Summer and Theo to the Shirayuki shrine. He and Theo were later discussing on how Summer temporally awoke as the princess only due to their barrier.
In SS043, he protected Summer from victims of the Gloom, only to end up infected himself. Then he battled Shutendoji under the effects of the virus, after they fought, he regained consciousness only to tell Shutendoji to kill him to remove the virus from him. Despite Shutendoji's reluctance, he used Voidera's Sacred Sword, and slayed him, removing the virus, but killed him at the same time.
Etymology
Trivia
- Before Ashura was revealed, it was assumed that Voidera was the wielder of the Wildfire Brand.
- He prefers Tempura over Sushi.
- In Yo-kai Watch 4, his soul is safely stored in the Wildfire Brand, and eventually returns to the physical realm. In the anime, he simply dies.
In other languages
Voidera
Language | Name | Meaning |
---|---|---|
洞潔 Dōketsu | ||
Abilguerriero | It's a combination of "abile" (Italian for "capable") and "guerriero" (Italian for "warrior"). |
Shinma Douketsu
Language | Name | Meaning |
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真魔洞潔 Shinma Dōketsu | ||
Vuotoguerriero | It's a combination of "vuoto" (Italian for "void") and "guerriero" (Italian for "warrior"). |
Ganryuu Shimanouchi
Language | Name | Meaning |
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島之内厳流 Shimanouchi Ganryū | ||
Prof. Abili | It's a combination of "professor" and "abile" (Italian for "capable"). |