Gonna be the Twin-Tail!!

Twintail Warriors

• Soji Mitsuka (観束 総二) Tail Red (テイルレッド)
• Soji (male)
• Souji (female)/Tail Red [2]
• A high school boy attending Yōgetsu Private Academy obsessed with twintail hairstyles. He later meets a mysterious beautiful girl named Twoearle, who appears before him from a parallel world. At the same time, monsters begin to invade town and attack everyone. In the midst of the chaos, Twoerle entrusted Soji with attribute power, This makes him transform into a twin tail warrior girl named Tail Red. Due to his alter ego becoming popular quickly after his debut and being the first twintail warrior, he is the leader of the Twintails. His weapon is Sword of Fire, Blazer Blade (炎の剣ブレイザーブレイド). In volume 4, he gained two power-up forms: Riser Chain and Faller Chain. He later gains Ultimate Chain, after regaining his Twintail Elémera, which he lost to Tyranno Guildy.

• Aika Tsube (津辺 愛香) Tail Blue (テイルブルー)
• [2]
• A high school girl and Soji's friend. She treats him like a brother and is rather overprotective of him, although she lives with him. Aika has a complex with her body, especially with a flat chest. She has a violent attitude toward Twoearle who often teases her. When she becomes a Twintail warrior, she was mostly hated by the public, until later when Tail Yellow joins the team. Aika was raised by her grandfather and has an outstanding ability of martial arts. She is known as Tail Blue when she transforms, and her weapon is Spear of Water, Wave Lance (水の槍ウェイブランス). She also gains Eternal Chain.

• Erina Shindō (神堂 慧理那) Tail Yellow (テイルイエロー)
• [2]
• The student council president of Yōgetsu Private Academy. Known as Tail Yellow in her transformed state, her weapon is Gun of Lightning, Vortex Blaster (雷の銃ヴォルテックスブラスター). She is a closet masochist and exhibitionist, and gets aroused when Soji calls her name (which usually triggers her to call him master). When she first became a Twintail warrior, she was a completely reckless fighter due to her maschostic ways. She was the only one of the twintails who at first could not use her power because of her denial, until she accepts it. Erina's twin-tail warrior form makes her whole body look a lot older and has a more well endowed figure. She gains Absolute Chain.

• Twoearle (トゥアール) Tail White (テイルホワイト)
• [2]
• A mysterious girl who came from another planet and the first Tail Warrior. She teases Aika sometimes and often ends up grievously injured for it. She fell in love with Soji at first sight and openly tries to seduce him with his mother's approval. After Soji defeats the first wave of attacks from the monsters, she joins Yōgetsu Private Academy as a student and becomes Soji's relative. Before arriving on Earth, she was the original Tail Blue but gave up her twin-tail hair style to make the Tail Red gear after her world lost all attributes. She felt immense regret and shame for not saving her world and retired from fighting, as she felt she was no longer capable of defeating the Ultimegill, and passed her mantle on to Soji, feeling he would do much better than she did. After seeing Soji's determination and willingness to protect the innocent, she was happy knowing she made the right choice on appointing her successor. She regains her twin tail form and became Tail White but her form is limited to a few minutes. Though it compensates by being more powerful than Soji's Tail Red in the Ultimate Chain form.

• Īsuna (イースナ) Anko Īsuna (善沙 闇子) Tail Black (テイルブラック) Dark Grasper or Dark Glassper (ダークグラスパー)
• [2]
• A girl from a different world, yet from the same place as Twoearle. She is secretly a big fan of Twoearle and stalks her often. After Twoearle arrives on Earth, she joined the Ultimegill organization and receives her alter ego Dark Grasper. After finding Twoearle, she betrayed Evil Gill. In battle, she is known as Tail Black. Her weapon is Darkness Grave Moebius, and her weapon when she was in the Evil Gill was Sickle Grave of Darkness. Her real name is Īsuna (イースナ). As an idol, she uses the name Anko Īsuna (善沙 闇子).

Others

A high school girl whom Soji rescued.

• Miharu Mitsuka (観束 未春)
• [2]
• Soji's widowed mother and the owner of the restaurant Adolescenza (アドレシェンツァ). She is aware of her son's identity as Tail Red and supports him as she dreamed of being in a position. She allows Twoearle to stay with her and Soji permanently.

• Mikoto Sakuragawa (桜川 尊)
• [2]
• Erina's maid with an outstanding physical ability despite her job. At times, she works part time as a PE teacher for Yōgetsu Private Academy. She usually slips marriage registration forms in the boys' test slips with her name on them, or having Soji sign his name on it. This is a clear example that she is desperate to get married before reaching 30.

• Mega Neptune Mk. II (メガ・ネプチューン＝MK.II)
• [2]
• Anko's robot partner. Because of her long name, Anko calls her Megane (Japanese for glasses) for short which she dislikes.

• Twin-Tail God (ツインテール合同)
• [2]
• An imaginary being within Soji's subconsciousness. He helps him restore his body.

• Strawberry Twin (ストロベリーツイン)
• [2]

• Emu Shindō (神堂 慧夢)
• [2]
• Erina's mother and the school's principal. She tries to fix arranged marriage meetings for Erina which the latter dislikes. When Soji stands up for Erina, Emu takes a liking to him and accepts him to be Erina's partner.

Ultimegill

Ultimegil (アルティメギル) is an organization of phantom-monsters called Elemelion who travel different worlds, seeking a variety of "attributes". Although they are enemies of humanity, the majority of them are rather silly and comical and behave much like otakus, often admiring cute girls, collecting dolls, and even adoring the twintail heroines. Having discovered Earth is rich in "attributes", they began to colonize and make plans to conquer Earth. Members include:

• Dragguildy (ドラグギルディ)
• [2]
• The leader of the Ultimegil with a twintail fetish.

• Lizardguildy (リザドギルディ)
• [2]
• An Elemelion soldier with a doll-holding girl fetish.

• Turtleguildy (タトルギルティ)
• [2]
• An Elemelion soldier with a bloomer fetish.

• Foxguildy (フォクスギルティ)
• [2]
• An Elemelion soldier with a ribbon fetish.

• Swanguildy (スワンギルディ)
• [2]
• An Elemelion soldier with the swan attached to the middle of the front face.

• Tigerguildy (タイガ・ギルディ)
• [2]
• An Elemelion soldier with a swimsuit fetish.

• Sparrowguildy (スパロウギルディ)
• [2]

• Krakeguildy (クラーケギルディ)
• [2]
• An Elemelion soldier with a flat chest fetish.

• Leviaguildy (リヴァイアギルディ)
• [2]
• An Elemelion soldier with a big breast fetish.

• Buffaloguildy (バッファローギルディ)
• [2]
• An Elemelion soldier with a giant breast fetish.

• Crabguildy (クラブギルディ)
• [2]
• An Elemelion soldier with a backneck fetish.

• Papillonguildy (パピヨンギルディ)
• [2]
• An Elemelion soldier with a lip fetish.

• Alligatorguildy (アリゲギルディ)
• [2]

• Hedgehogguildy (ヘッジホッグギルディ)
• [2]

• Kerberosguildy (スパイダギルディ)
• [2]
• An Elemelion soldier with a braid fetish.

• Owlguildy (オウルギルディ)
• [2]
• An Elemelion soldier with a literature fetish.

• Spiderguildy (スパイダギルディ)
• [2]
• An Elemelion soldier with a male crossdressing fetish.

• Fleaguildy (フリー・ギルディ)
• [2]
• An Elemelion soldier with a leg fetish.

• Wormguildy (ワーム・ギルディ)
• [2]
• An Elemelion soldier with a crossdressing fetish.

• Snailguildy (スネイル・ギルディ)
• [2]

Light novels

Gonna be the Twin-Tail!! began as a light novel series written by Yume Mizusawa, with illustrations by Ayumu Kasuga. Mizusawa originally entered the first novel in the series, originally titled Sore wa, Twintail no Isekai (それは、ついんてーるの異世界), into Shogakukan's sixth Shogakukan Light Novel Prize in 2011 and the novel won the judge's prize.[3] The first novel was published by Shogakukan on June 19, 2012, under the Gagaga Bunko imprint, and fourteen novels were released on December 19, 2017.

The series was originally slated to conclude in October 2018, with the release of its 16th volume.[4] However, a 17th volume was released on March 19, 2019.[5] The series ended with the 21st volume (22nd overall) on November 18, 2022.

The first volume was released in English on Shogkukan's novel app on January 23, 2025.

Manga

A manga adaptation titled Ore, Twintail ni Narimasu π (俺、ツインテールになります. π) by Ryōta Suzuki was serialized in Square Enix's Monthly Big Gangan magazine from August 25, 2014[28] to June 25, 2015,[29] and was compiled into two tankōbon volumes.[30]

Anime

An anime television series adaptation produced by Production IMS and directed by Hiroyuki Kanbe, aired in Japan from October 9 to December 25, 2014. The opening theme is "Gimme! Revolution" (ギミー!レボリューション) by Maaya Uchida. The ending theme is "Twin-Tail Dreamer!" (ツインテール・ドリーマー!) sung by Sumire Uesaka, Yūka Aisaka, and Chinatsu Akasaki. Both singles for the themes were released on October 22, 2014. The anime was licensed by Funimation in North America,[33] and in the Middle East, North Africa, and Europe (excluding North America, Scandinavia, and United Kingdom) by Crunchyroll,[34] and AnimeLab in Australia and New Zealand.[35]

Episode list