Last year I asked a number of people about the compatibility of the Sisters of Silence with an Empire army and while all agreed they would work there were no examples of this being done.
Earlier this year I saw a built Lady Greyfax in the local GW window which I liked the look of. The shop manager said she was only available as part of a set, but could be got on Ebay for £18-20. Less than a couple of weeks later GW announced she was to be released as a single figure (I would have thought that he should have known this). Not that this mattered to me as I was fortunate to obtain her for £10 and as the Sisters of Silence were only a couple of £ more bought them as well.
Basically a unit of 2hd swords there were little or no 40K markings on them so it was just a case of finding them proper great swords, some puffy sleeves and building. I looked at illustrations from the Medieval sword manuals and chose a stance that matched the figure’s leg positions to save on conversion work.
Grayfax also received new arms and a head from the Sisters, together with the spare loincloth from that kit which didn’t need much work to make it fit. Her hat brim isn’t really wide enough for a Priest of OM but she doesn’t look as if she’d give anyone the chance to convert.
Like the Gonnes this unit is not mentioned in Discworld but I’m sure Leo Quirm has something to do with them. The theme is going slightly towards Steampunk but still without the availability of black powder and refusing to use wheels and cogs and other common steampunk iconography.