Hmm, maybe a bit more on the strike against the Chaos leaders and with the CSMs. Something they personally did to catch the eye of the Inquisition like coming upon a grand Chaos ritual that threatened their sanity and faith in the Emperor, she then held her resolve and using a melta gun killed 2 Chaos Space Marines personally before throwing a satchel of melta bombs into the ritual circle killing many and disrupting the ritual to kill the rest type of deal.

edit: To try and better explain what I am getting at from your character now it shows that they were a strong leader, holding their platoon together in nearly impossible circumstances. What an Inquisitor is looking for though is an exceptional individual.