Airi Arcadia

Airi Arcadia is Lux Arcadia's younger sister and a student of the Royal Officer Academy. Like him, she is a survivor of the Old Arcadia Empire's Imperial Family, making her a former princess. Airi has shoulder-length light grey hair and grey eyes, similar to the rest of her family. She wears the Royal Officer Academy school uniform. Like her brother, she worn a black collar which she and her brother were considered as criminals due to their bloodline. Airi has a very calm temperament, as shown when she didn't panic even when an Abyss attacked the Academy. She is critical of her brother, but at the same time is confident in his strength and worries when he overexerts himself. She becomes flustered when other people tease her about her relationship with Lux.