Alcippe

Daughter of Ares and Aglaurus (a mortal princess). Ares kills Halirrhothius, Poseidon's son, for assaulting her. Poseidon demanded justice for his son, and Ares was judged by the Court of the Gods in what, according to the myth, was the first trial in history. Ares claimed to have killed Halirrhothius to defend/avenge his daughter from rape, and Alcippe confirmed her father's statement. The gods believed them and, as there were no witnesses to the contrary, completely acquitted Ares.