As the commander of the Black Widow's Venom Company, Zastra the Blade is a direct subordinate of fellow Blood Knight, Isyra. Zastra was also trained at the Spider Prince's secret academy, The Dark Garden. 

He is a descendant of Abruvat-Juti, the Gudanna Ancient One of Silent Speed.

His sigil is a blood-stained knife on a field of light and dark red diamonds.