Waillo

is a Holy Knight and a member of the Six Stars of Azure Sky, who serve under the assistant to the Great Holy Knight, Denzel.

Current arc
During the award ceremony held in honor for the Seven Deadly Sins sans Ban and King who were at the Fairy King's Forest, and Escanor still missing, Wayeo and his two comrades, Death Pierce and Dogget showed themselves after Meliodas called out to the Holy Knights who have doubts and complaints behind his back to step forward.

Wayeo then witnesses Dogget facing the legendary captain of the Seven Deadly Sins and throughout the fight, noticed Meliodas' defended and attacked simultaneously after Dogget's hands were incapacitated. Wayeo watches as Dogget was defeated and sent flying back to Death Pierce who easily caught him as Meliodas asked who's next to face him.