After parting ways with Lauren, Rein returned back to the room where he was staying with his lovers. After entering the room, Rein saw that it was very well decorated with various things that Rein liked.
Rein had a special liking for various magical mechanical parts and he was able to find various such parts decorating their inn room. Rein also liked dragons a lot and that mythical beast was used as the theme of this decoration.
But not only were there many dragon sculptures, Tasha and Stella were somehow able to find even a real Astral dragon. Obviously it was dead. But Rein did not have any liking for a alive dragon except one as they all were arrogant pricks, with their pride vaster than the ocean. So in Rein's mind, only a dead dragon was a good dragon.