The first room on the left where you can change Aura's disposition towards people, you can insert Alicia into various relationships, but also after a while you can swap Alicia higher up those relationship by interacting with the other person on the platforms. So in that case you need to interact with rose to switch her with Alicia. That's probably the least obvious because there is a time delay before that interaction becomes available and nothing directs you to do it. But it's worth checking everything - the bin in the knowledge room, the computer in the knowledge room, the thing in the bottom left of the knowledge room, all the platforms in the interests room, all the objects in the appearance room.
Assuming you have let a decent number of days pass without anything seeming to progress then there is something in the mindscape you have missed, so it's worth combing back over.