User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-189.201.211.58-20180107134843/@comment-30924344-20180107140230

It's talking about Xenovia's familiar which she gets in the short story from DX.3 'Graduation Trip and Vortex Bunch'. Her familiar is a black Shisa who used to be a member of the Vortex Bunch.