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.
Humans were banned to Earth a very long time ago for their creativity, and an environment was shaped around them to ensure they never needed anything from outside of their home planet. Yet the universe forgot that along with aloof creativity and imagination comes an insatiable curiosity.