Ryuga Kiryu

I'll Conquer This Battle Ryuga's Pre-catchphrase before fighting Ryuga Kiryu is the Main Protagonist in Kamen Rider Kalus. Ryuga is Kamen Rider Kalus or called Armored Rider Kalus. He's been called Kouta's Shadow by Yggdrasill in Season 3.

History
Ryuga was the third son of the Kiryu Family. He was taken care by his brothers Aguri and Ryuta Kiryu. When Ryuta was kidnap, He was told that Ryuta went to live with their Uncle and Aunt. "I will save you Ayumi!" Ryuga words after seeing his sister 'dead' After the Kiryu have their final child, Ryuga takes care of his little sister Ayumi. One night, Ayumi was taken. Ryuga went to find her and saw her in a machine. Once it exploded, Ryuga was depressed. His father erase his and Aguri's Memorys to forget about Ayumi's Death. "Do you want to join our team?" Ryuga's words to Yui Kirishima Ryuga and his friends started dancing and call themselves Team  Nex Gen. After a few months, Ryuga meet Team Gaim and Team Tru Heart and dance together sometimes. Ryuga meet a fan named Yui Kirishima. After seeing her dance, Ryuga asks her to join and was happy to see her to join. One of the members name Tetsuki Danda trys to take Team Nex Gen as a gang. Ryuga beat him in a Inves game. Ryuga meets Koji Karasuma and asks him to join.

Behind The Scene
Ryuga Kiryu was just a name for the character when the creator was making the series.