They were six years old when Master Gregory took them from the creche to train as Knights. At eighteen, Tamar took down a demon-mounted host in a brutal, snarling mess of a fight as Gregory lay dead at her feet. Half the known worlds saw that video by the time it was done - a Novitiate Knight somehow managing to stand against a demon host.
A major mistake made by predators and oppressors is attempt to destroy your self-esteem by humiliating you. When people are simply hurt by an encounter, they will want to back off and be reluctant to face you again. But if you continually ridicule them you generate not fear but anger. People who become angry enough lose their fear and the power of the oppressor is at that moment broken. Those who have been humiliated and are very angry are extremely dangerous and capable of anything.