Amateru is a Commander of the Tenrou nation, one of the highest ranks of Tenrou nation, Commander of the Eastern Army. She is a member of the Ten Stars of Tenrou.

Amateru similar to her fellow Ten Stars member, Shamon; she was raised in a temple and raised in nature. Though unknown, she eventually became highly skilled in combat and eventually garnered the attention of the vile king Zuou and was admitted as a member of the Ten Stars and placed as the Commander of Tenrou Eastern Armies.