My T once attempted some inner child work with me and asked if there were anything in the room we could use to represent her so we could talk to her. My T has an assortment of dolls on the back of his couch (Freud, Dali Lama, the Scream), but nothing seemed remotely appropriate. It was super awkward, and I couldn't go through with it.
If this is work you're going to be doing for a few sessions, would it make you more comfortable to bring in your own figurines? I have a little stuffed black cat that I take to hold during tough sessions for just that reason.