One of Yuji and Shana´s classmate. He´s the best friend of Keisaku and follows Margery Daw. He has feelings towards Ogata.
Tanaka´s a tall athletic boy with a really calm personality that hates studying. His eyes are usually closed, but they will be opened if he's surprised.
He is best friend with Keisaku, and together they found themselves involved with Margery Daw, who saved them by mere luck from a gang of bullies. They were so admired by her strength that agreed to follow her as her "servants" and helped her moving around the city. They were the ones in charge to operate Friagne´s Haridan. He´s in love with Ogata, who shares the same feeling towards him.
After Margery got out of control after seeing that Yuji´s Fuzetsu was silver colored and nearly killed Ogata in her rampaging burst of rage, he decides to stop following Margery and live a normal life along Ogata, being very protective towards her because of the trauma that situation left on him. His relationship with Margery is now respectful but precocious, this doesn't mean that they are not friends anymore, its just that he no longer wants to live a life of adventures along Keisaku and Margery.
In the final, he realizes that he cannot dodge the truth. He must help Margery, moreover because Keisaku's gone to the Outlaw branch.