For Isabella I switched her dagger for a short sword and I added four tormented souls summoned by our Lady of the Night. My client has his army themed mostly around ethereal creatures so I wanted to give her an aspect of that as well.
As for the rhino I decorated side doors with one of the salamander chapter's symbol. It turned out quite nice in comparison to the original. The bigger pair of horns is a bit too big but I think it's OK. Certainly, you won't mistake it for a chaos symbol or anything else. At this point the symbol looks like a Dragon's head with a bad case of flu xD. I'll do a comparison photo when I finish painting the symbol.