Female sangheili are housewives to put it bluntly, they are not warriors and they not expected to be anything else. That is one of the foundation rules of the haloverse, and to break it by turning her into a ninja would turn this into a b-rate action novel, akin to those where 1 person can single-handedly disassemble the entire CIA. That is not Wolver's style, he prefers to dwarf the reader in an immense storyline, more mountainous and bumpy than Katie Price's chest. I believe that not one species in the covenant deploy females into the field, its part of their culture not to have female warriors.