Sōji Mitsuka
Sōji | Tail Red | Sōra


観束 総二
Mitsuka Sōji
  • Tail Red (テイルレッド?)
  • Sōra (ソーラ?)
  • Human (Soji and Sora)
  • Tail Gear User (Tail Red)
Age 15

Child (Tail Red)

Gender Male (Soji)

Female (Tail Red and Sora)

  • Yōgetsu High School
  • Twintail Club
Status Active
Light Novel Volume 1
Anime Episode 1
Voice Actor/Actress

Nobunaga Shimazaki (Japanese)
Sumire Uesaka (Tail Red; Japanese)
Austin Tindle (English)
Bryn Apprill (Tail Red; English)

Tail, On!
— Sōji Mitsuka

Sōji Mitsuka (観束 総二 Mitsuka Sōji?) is the protagonist of Ore, Twintail ni Narimasu..

Sōji is a student at Yogetsu High School, and he has an obsession with the Twin Tails haircut. He is the only male who knows how to use Tail Gear; when he uses it, he turns into Tail Red (テイルレッド?).

Appearance Edit

As Sōji Edit

Sōji has the appearance of a young man with a height of 164 cm (5'4"), dark red spiky hair, and orange eyes. He usually is seen wearing his school uniform, which consists of a white shirt, a blue tie, a cream-colored blazer, black shoes, and trousers.

As Tail Red Edit

As Tail Red, he becomes a short and thin young girl with a petite appearance. Standing at a mere 129 cm (4'2"), she is extremely short compared to Sōji and the other Tail Gear users.

Her hair is slightly brighter than Sōji's, and it splits down to her feet and burns into a fiery orange as it makes its way down her body. She has red eyes, unlike Soji's completely orange eyes. Her suit consists of her Ribbons that split her hair into Twintails. She wears a red necklace around her neck with a crystal in the center. She wears a black and white swimsuit. On her arms she wears black metal cuffs with leather black gloves on her fingers. On her legs she wears black tights that are red at the top and over her tights she wears long metal boots that are red, black, and white.

As Sōra (Solar Metca) Edit

In Volume 4, the Tail Gear malfunctions and only makes it halfway through the transformation back into Sōji. Because the Tail Gear adjusts the users DNA to fit the armor, it tries its hardest to work, and the best it can create is Sōra, a fusion of Tail Red and Soji.

She stands at a height of 146 cm in between Sōji and Tail Red. A bit unlike Soji, Tail Red's eyes are slightly redder than her male counterpart's. Sora, like Soji, is also at the age of 15, meaning that her chest and breasts are much larger than the young Tail Red's. This makes Aika very jealous of Soji's new breasts being noticeably larger than hers.

Personality Edit

Tail Red behaves much like Soji in the way that they both have a sense of justice but also a sense of blitheness.


Tail Red's little girl side showing while she is afraid of one of her enemies

While in Tail Red form, Soji does have moments where she (he) behaves like a young girl would, although she still uses masculine honorifics such as 'ore', a very masculine way of saying 'I' in Japanese. She is also perpetually taunted at by her enemies for being a "little girl". This can sometimes have an effect on Tail Red's confidence in battle.

Furthermore, Soji does not seem pleased with the fact that Tail Red was getting extremely famous, as he considers it embarrassing.

Soji has been shown to have a liking towards his Tail Red form and often plays with her Twintails when he has transformed into her using the Tail Gear.


Ever since Soji was a child, he has had an obsession with the Twin Tails haircut, always wanting them but unable to have them due to his gender. Aika would often tease him about it; she even changed her hair style to twin tails just to annoy him.


"What's happened to me?!" - Soji after transforming into Tail Red for the first time.

On his first day at Yogetsu High School, the school council president Erina Shindō was attacked by the Ultimagills, who wanted to steal her Twin Tail Attribute. It was at this time that Thouars came to Soji and Aika, claiming that Soji is the only known male in existence that could use the Tail Gear. She gave him the "Red Courage" Tail Gear, and Soji complimented the cute little girl with Twin Tails in the car only to realize it was his own reflection and that the bracelet had transformed him into her. Much to his shock, an army has now targeted him, as one of the Twin Tails they had been searching for finally appeared. The Little Girl Soji now was, was surprisingly powerful. At first, he thought that now he was a doomed and defenseless little girl, though a flap of her hands sent hordes of the beasts flying across the sky.

After defeating the monsters with her newfound abilities, she was thanked by Erina Shindō, who at the time didn't know that the little girl was a boy she went to school with. The girl was still confused as to what was going on and didn't know what to say. Erina asked who she was, and the girl called herself "Tail Red".


Soji turns into Tail Red to play with her Twin Tails when nobody is looking

Soji, now back as a average teenage boy, came to school the day after and felt embarrassed how famous Tail Red now was.

On the bright side, Soji loved (his) new Twin Tails and would often transform into Tail Red to play with her Twin Tails while she thought nobody was looking.

Powers and AbilitiesEdit


Although she may appear weak because of how physically small she is, Tail Red is considered by some to be the strongest Twin Tail. With a few seemingly effortless punches, she can send hordes of enemies flying. She is also extremely athletic, able to jump tremendous distances. She can use the Ribbons on her head to summon weapons, such as her signature weapon, the Blazer blade, a long Red sword that can send even the heaviest opponents flying.

Her strongest attack, however, is the Aura Pillar; when all the gems on Tail Red's armor glow, she is capable of firing a giant red energy beam from her cuffs. This blast homes in on her opponents. Unfortunately, she does not know how to activate it at will—it only activates when she is incredibly upset.

Riser ChainEdit

One of Tailred's Infinity Chains. In this form, Tailred's attack power is increased. This form's final attack is Rising Blazer.

Faller ChainEdit

One of Tailred's Infinity Chains. In this form, Tailred's speed is increased.

Fellraiser Chain Edit

One of Tailred's Infinity Chains. In this form, both Tailred's speed and strengh are incredibly increased.

Ultimate Chain Edit

Tailred's Ultimate form by using two Tail Gear braces. It is currently considered to be Tailred's strongest form.


  • Sōji's birthday is February 2.
  • It hasn't yet been explained why Tail Red is apparently younger than Sōji.
  • In their default forms, Sōji is the tallest of the Tail Gear users, but when Sōji is Tail Red, she is by far the shortest.
  • In Vol 10, Sora is considered to be Sōji's opposite and other half.
  • Sōji found out when he was into girls and not twin tails, he turned into a girl named Sora.
  • Sōji's name literally translates to "all" and "two," or "all in twins." Similarly, Mitsuka literally translates to "appreciation of bundles." In other words, Sōji's name can literally be seen as "lover of all twintails."



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