Onyx Enemies

Ryuji Kisaragi's cousin and the founder of the Seven Tails company.

A white dragon and Onyx's childhood friend.

Rose is a young Red Dragon who is being looked after by Eriko Nanao and Ryuji Kisaragi, a young man whom she fell in love with at first sight.

Ryuji is a level 10 Breaker and a fairly normal high school student who has a dragon girl named Rose placed under his care. He is a kindhearted young man with a strong desire to protect those around him.