The dazzling twin children of Ai Hoshino, a former idol who was killed by an obsessive fan. Ai had Aquamarine and Ruby in secret, hidden from the public eye.

Both are 16.

Aquamarine is cold, calculated, cunning and discreet, willing to do whatever means necessary to see his goals of finding his father through.

Unlike Aqua who is calm, calculated and discreet. Ruby is the polar opposite of him as she is extroverted, outgoing, loud, optimistic and communicative compared to her brooding brother.