Amayo (アマヨ, Amayo) is the ex-wife of Michiru Tsuki and the mother of Hikaru Tsuki. Three years before Kakeru Tsuki's death, Amayo had a son with Michiru and married him. The marriage would end in divorce, however, due to Michiru's personality and she couldn't keep her son with her because of the wedding contract she had signed. Amayo loves her son Hikaru very much and wants him safe. She hates people that think money can buy happiness to where she would slap Michiru over it. Kakeru Tsuki described Amayo as being a sensible individual.