Rea Astaroth

Rea Astaroth, also known by her moniker  'Hell Breaker' , as well as affectionately  'Red'  by Artemis, is a squire training to become a knight in New Camelot's Helix Knights. She is also one of the main characters of the series, and a pivotal figure in the story's future events.

Born in the Demon Realm, a world residing in another dimension directly alongside the world of Ethenia, and a direct descendent of Lucifer, she is the sole heir to the throne of the current Demon King and the first of her people to be invited to join the Helix Knights. She is the first person Colin meets when arriving in Ethenia and the two become fast friends. They also become immediately enamored in one another.