Expanding on Tam's coat. I also changed the inside lining to be more like Ivan's.
The coat is a hammerspace and can be entered through the back or the side pocket, but I don't think Tam is taking his coat off and inviting anyone in Lol

I try to write alt text on bluesky. It's too much trouble to copy paste it everywhere (and it's often too basic to bother), but here it is for non english speakers:

Tam's coat is a hammerspace. It can freestand and the back opens like a curtain.

The hammerspace is connected to others and may lead to Ivan's cottage or a literal dragon belly (Tam's alt form). It's a toss up between cozy cottage or acid bath. Do not recommend rolling that dice.
There's a door to Ivan's cottage inside the dragon, but it's not easily reached.

The side pocket is safe and goes to a literal pocket (bag of holding-esque). Same red fabric. It eventually leads to a mechcanical maw mounted on Ivan's wall.