In the past, Tsutsui had similar proportions to a girl, for which he was constantly bullied by his classmates, hence he became a truant.

After shutting himself indoors he came to realize he was "lacking power" and got a muscle band.

Due to all the misunderstood rumors, some delinquents, that had come to take revenge on Akane, recognized Handa and fled, hence Akane Tsutsui became Handa's SP "Security Police/ Security Personnel". 

This guy is your typical rough and rowdy kind of character. He's got a deeper voice than the rest. Think of a gangster gone soft for further inspiration.