McCool has short blonde hair and blue eyes. He is normally seen wearing armor and a red cape.
McCool is loyal to Rubiria and prioritizes her safety at all times.
As the personal guard of Rubiria, he escorted her alongside Rou and his group to the Royal Capital of the Sternbild Kingdom as an extension of the latter's First Expedition.
He trained with them several times on the way to Osvel.
Rou thought that it was better for him to use a spear than a sword.
He serves Princess Rubiria.
He trusts Rou after the latter helped save the princess.