Talk:Open Book/@comment-26224271-20150319223426/@comment-26202330-20150320211335

Lion can't be a creation of Rose's Room.

Rewatch Rose's Room (the episode) and Steven encounters a simulated version of Lion and like the other inhabitants it doesn't react to him.

The only one who does is Greg (because Rose herself had met Greg so the Room could simulate him more accurately).

If the room "knows" about Lion (as it does Greg) he would've been as accurately simulated.