Dana McAllen is a member of the urban exploration association that is currently investigating remnants of the worlds previous civilization. She initially made her debut in the Tunnelrunners side comic. She has been Ian's closest friend since early childhood, and is still his closest confidant.
Translation: “You have my blessings, if you needed them. Have fun, but make sure you keep the noise down for those of us who will be getting actual sleep tonight”
Because the room is a preset, and I doubt the content author knew enough or cared enough to check that when they built it.