Albireo Sage is a young wizard who hails from Iceland. An only son of Alistair and Inaya Sage, Reo is an inquisitive kid who likes asking anything that piques his curiosity, and often absorbs the knowledge at a face value.

Reo has his own pace and quite independent at some level, as he enjoys wandering on his own since his parents tend to let him roam freely around their house or the beach, where he usually plays with some seals. However, the boy also has a slightly clingy tendency, particularly to his mother, as he spends his time most with her. On the contrary to his soft and meek look, he has quite a temper and blunt tendency to speak his mind. This characteristic comes from both of his parents, for better or worse.