Coud is a member of the Red Lynx sky pirates, though not very skilled or respected due to his youth. he accidentally awakens the Edel Raid Ren after a raid. Though she has a distaste for humans, Cou treats her as a normal girl and fights to protect her when pursuers arrive, and Ren repays him by reacting with him. He agrees to escort Ren to Eden Garden, and through his company, Ren's feelings towards humans change.
On his own, Cou battles with a grappling hook-type weapon, which he uses mostly to dodge attacks and trick enemies with, though he doesn't do very well. After reacting with Ren, she replaces his right arm with a wind-based sword, which allows them to manipulate wind to both thrust it at enemies and create defensive barriers.
His naive outlook at the Edel Raid-versus-humans debate makes him treat everyone equally, and he sticks by Ren not for her power, but because he has feelings for her. Of course, he's not very good at explaining that to her.