cold, calculated, cunning, and discreet; A man willing to do whatever to achieve his goals. he has a twin sister named Ruby Hoshino. Their mother (Ai Hoshino) Is killed by an obsessed stalker when Aqua and Ruby is just in kindergarten. Now They live with their foster parents ( Ichigo Saito and Miyako Saito). Aquamarine is often called Aqua, he's really cold and discreet because of his mother's death, he's traumatized for life. He has blond hair and long bangs that almost cover his left eye.