Had a bit of confusion over this; how many Independent Characters can join a single unit? Because we know they can all join each other to make a Death Star, but can you say, for example, stick Dante, a Librarian and a Sanguinary Priest all onto the same unit of Sanguinary Guard? Or is it, as I suspect, only one Independent Character per squad?

As a side note, can Independent Characters attach to Monstrous Creatures? Say Lelith Hesperax and Urien Rakarth attached to a Talos?