|Anime | Manga|
|Light Novel||Volume 1|
|Japanese Voice||Yoshihisa Kawahara|
|English Voice||Tyson Rinehart|
Ryuutarou Tatsuno, also known as Tatsu is Tora's duo partner. He's called a muscle head because of his personality and strong build.
Unlike the other boys, Tatsu has a very muscular physique, and he is also very tall. Tatsu has spiky, short brown hair and purple eyes (that is usually shut). Girls also think he is quite handsome.
Although he doesn't speak much, Tatsu has shown to be strong-minded, both in appearance and personality.
In Episode 8, it is shown Tatsu worships 'The God of Muscle' through training.
- His blaze manifests in the form of a naginata.