The guard won't let you in to see her no matter how you plead. We're going to have to find a way to convince him we have the right to get in.
Hint 2
There's no way to change the list of approved visitors. Rather, we need to convince the guard that Rosa is actually someone else whose name is already on that list. Can you think of someone who's still alive who's a friend of Susan's?
Hint 3
Alexander Davenport would be perfect, except Rosa is clearly not a boy named Alexander. But do you remember someone else you talked to recently who confused people with an androgynous name?
Hint 4
Remember Adrian, the RA? He was assigned to a girl's floor because of his name. Alexander is a male name, but it could be shortened to Alex.
Hint 5
To get Rosa to think of this, go into the notebook and click on "Adrian" and "Alexander Davenport" to get "Alex Davenport." Now go back to the guard again, make any excuse you like, then tell him your real name is Alex Davenport. Isn't it lucky that this guard never heard of asking to see some identification?