Tokoyaku "Shin" Myung-Sun

Shin is a boy with a Japanese-Korean mixed background. He also have a nickname, "The King of BlackJacks".

Background
Shin was born in Japan raised by a Japanese father and Korean mother. At the age 6, he and his parents moved to Seoul, South Korea due to his mother that got a rich job. When he was 10 years old, he loves playing cards. He became obsessed with them but sometimes, he get bored playing old card games. So, that's why his dad gives him to play Cardfight Vanguard. He started to love it and battles every cardfighters he beats. At age 14, Shin's father died from a headshot. It said that he was playing poker against some gangs but then, it causes a gang fight. Now, Shin is living with his mother. Back then, his mother gives Shin a gift from his father. It was a gaulet morpher called "Royal Flush". It can transform him into a powerful cardfighter. He now create his nickname "BlackJack" from a poker game. Then at age 15, his mother came home with a girl named Jin-Ri. She found her in the streets and she said she lost her parents. So, his mom going to adopt her. But then, Shin knows the secret about Jin-Ri. At age 17, Jin-Ri convinced Shin that she's in love with him and Shin accepted her as his girlfriend. Shin's mother was okay for these two to be a couple. At age 19, Shin, Jin-Ri, and hs mother moved back to Japan.