i think there is a probability that in "storm in the room". the room is summoning the real rose (pink)
like, she's a diamond and maybe the room is not summoning her, but projecting her from steven's gem. that's why rose (pink) can freely interact and has feelings and has memories from her past like she remembered the video record that she gave to steven. i think if steven enter the room, he can talk with pink again to gather more information.