1. Fat Lady’s Portrait

This is the first password you will get. When you are trying to find Hermione
at the beginning of the game you need to find the password to get into
Gryffindor Tower. At this point in the game there is usually a Gryffindor
running up or down the staircase near you. Grab them and ask them if they know
the portrait password. If there is not a member of Gryffindor near you then
find any Gryffindor and they will tell you. When you do find out the password
you need is "Mimbulus mimbletonia".

2. Damara Dodderige’s Portrait

You must speak with this woman when you see her on the Grand Staircase on a
Third Floor landing. If you try to talk to her in her other portrait she will
just snooze on. To get her password is very simple. All you need to do is go
down the staircase to talk to the painting of Gifford Ollerton on the first
floor. When you have asked him for her food return to her portrait and she
will tell you the password is “Chops and Gravy”.

3. Gifford Ollerton’s Portrait

You must talk to his portrait on the first floor landing of the Grand
Staircase. When you do he will tell you that he may only let someone from
Hufflepuff through unless they have the password. To get the password you need
to have helped a member from Hufflepuff House. So the simple solution is to
find someone from Hufflepuff and ask them for the password. I can usually find
one in the Entrance Hall to talk to. When you have found one, they will
remember that you helped Cederic Diggory last year at Hogwarts so they will
tell you the password is “Dragon’s egg”.

4. Percival Pratt’s Portrait

This rhyming man can be found on the fifth floor landing of the Grand
Staircase. He will ask you to “seek the man with faces three”. To find the guy
with three faces you need to go up to the seventh floor near the Room of
Requirements. If you stand with your back to the door for the Room of
Requirements and walk down the corridor in front of you, the portrait you are
looking for is on your left at the end of the corridor. It is covered in
cobwebs so you will need to use Incendio on his portrait first before you can
talk to him. When you do he will tell you to find Basil Von Fronsac.

To find him you need to go to the portrait on the second floor landing on the
Grand Staircase. When you talk to him he will send you to the portrait of the
Shepherdess on the second floor landing which is very...