Ethel Lindbergh is the illegitimate son of Emperor Esteban.
Ethel is a quiet child, but he has quite the temper. Because of the numerous betrayals he has faced, his vigilant eyes always look out for changes, and he's distrustful towards others. Even when someone is genuinely kind to him like Kayena, his eyes show his hesitation towards accepting their kindness since he's afraid of getting hurt again by unfamiliar tenderness. Nevertheless, he's a kind and caring person who deeply cares about those close to him, especially his mother. He's deemed to be a promising knight candidate because of his innate muscular strength and agility, but he uses this talent to harshly beat up his bullies.
