Antaro is security to Cajeiri, heir to Tabiniaiji of the Western Association. She is Taibeni by birth and trained as a ranger; she is training with the Guild to improve her skills.

Antaro's nickname is Taro. Her brother is Jegari, also security to Cajeiri. She is the elder sibling.

Antaro and Jegari are about fifteen at the time of CONSPIRATOR.