Aeon, also known as Aion, is a supporting character in the anime Show By Rock!!. He is a lion Myumon standing 192 centimeters tall with red eyes and long blonde hair, and his birthday is February 10. Aeon serves as the guitarist and composer for the visual kei band ShinganCrimsonZ. His personality is highly eccentric and dramatic; he refers to himself with grandiose titles such as the Black Monster or the God of the Black Sun, and he frequently strikes theatrical poses, often with one hand over his face. Despite his aloof and condescending manner, especially toward his bandmate Crow, his passion for music runs deep. Aeon was born into a wealthy, prestigious family and was expected to become the next successor, but he hated that path and chose music instead, leading his family to disown him. This decision placed the pressure of succession onto his younger sister, Ailane, creating a rift between them. In the story, Aeon reconciles with Ailane, apologizing for leaving her behind and mending their bond. Within his band, he shares a strong camaraderie with drummer Rom, vocalist Crow, and bassist Yaiba. Aeon wields a distinctive guitar named Holy Ark, shaped like a black coffin with crossed chains and a gothic sun symbol. His musical talent serves as a powerful force in the Sound World, capable of inspiring others and combating dark monsters.