In my upcoming campaign we have one female player. She will be playing the part of an Ordo Xenos Inquisitor with a group of 6 Deathwatch. I am allowing the character to have a suit of Ignatus-Pattern Power Armor from page 143 of the Ascension book. It is mentioned in that book that some of those suits are thousands of years old. In the Deathwatch book on page 163 the box on Detailing A History Of Valor suggests that it is possible to develop different Armor History than the list provided. I think it would be neat to have an armor history for the Inquisitor's armor, but I don't really think any on the published list for Astartes armor is necessarily a good fit.
Anyone have any cool ideas that I could surprise my players with?