Useless? He's the Swordmaster

Yarden is known as nothing more than a spoiled playboy, but behind that act, he is the Blade Lord who defeated the Northland's Eight Reapers three years ago. For over a decade, he has hidden his strength, waiting for the day he can avenge his mother. After Prince Leon massacres the people of Bleak Province and is taken prisoner, the Eight Reapers plot a jailbreak, leaving the Falcon Empire besieged on all sides. At the same time, Yarden's older brother Yorick steals the credit for everything he has done. When the Fourth Sky Reaper storms the Sixth Precinct and crushes everyone in his path, Yarden finally reveals his true strength. He kills him in an instant and reveals who he really is. From then on, Yarden tears through the Reapers' schemes one by one, and finally faces the Blood Blade Magus.