The main difference between Ryuya in the manga and the movie is the hair style, but Ryuya in the movie has the correct hair style, because he is a first grader, while in the manga he is a second grader, so it is normal to change his hairstyle.

The protagonist of the "crows" manga, Haruichi Shoya, is as powerful as Kei Hayashida and is a very powerful person. As for who is the main opponent you asked about, this cannot be explained, because the manga is centered around Harudao, who is the protagonist, and some were rivals in the past and later became friends. In principle, the only opponent is Hayashi Tianhui. In the first stop, the two fight It was a tie, and in the second battle, Harudao was defeated. This is something Harumaichi has never been able to let go of. In addition, let me introduce the character Mito Ryuya.

Mito Ryūya, the younger brother of Mito Makio. According to the comics, there should be no one in the movie except Lin Tianhui who is this guy's opponent. In the movie, Mito is still in first grade and doesn't seem to take part in the fight.

In the manga, Mito Ryuya ranked second as one of the Four Four Crows Kings (Bouya Harunichi, Mito Ryuya, Nine Nōryu

Nobu Furukawa Osamu) easily defeated Saka. Hideto Higashi and Hiroyuki Kirishima, Makoto Sugihara are not his opponents. However, He Fangwu

Harendo's strength was too far behind and was knocked away by Harendou's three punches. When he was in junior high school, he defeated Ryunobu, a member of the armed front, but later came to Mito Ryuya and Ryunobu, who were about equal in strength, but they were mortal enemies. In the second grade, Hosen's eldest son, Machida Sekiri, was defeated by Hideto Bando and became Hosen's boss. In the third grade, he gave up the position of boss to his younger brother Mito. Xingxiu, when he was bored, was invited by Haruichi, and went to the seaside city to form PAD with Haruichi, Ryu Nobu, Haruyama Koichi and others to help the trio from the south of the county deal with the dangers of the "Snakehead" organization. Later, he transferred to Tokyo and was beaten by the Nine-Headed Dragon Man of the Empire by Manshi

He was unable to resist and even broke his hand. After recovering from his injury, he also joined the boxing team that the fourth generation of the Armed Forces, Kuno Ryunobu, had retired to. Perhaps it was because he had fought side by side with Ryunobu, and the two of them no longer seemed so hostile to each other.