Sirius Black

Sirius’ dreamscape starts off on Platform 9 and ¾.  The platform is completely full of people.  People dressed in strange robes and other wizardly clothing and more normal clothing are all over the place.  Parents and children walk around freely, sharing in the excitement of leaving on the Hogwarts Express.  You can either wait and see what will happen (which will result in seeing various versions of Sirius through the years arriving and leaving Hogwarts), go directly onto the train (which will result in seeing Sirius’ years at Hogwarts with his friends and eventually his life after graduation), or go through the wall entrance to the platform (which will take you directly to the Black Family’s house and show you memories of his childhood).  Along the way it will be possible to run into certain people (professors, friends, family).  They will not interact with you, but if you try to interact with them you will get specific memories of those people from Sirius’ mind. 

The platform is the smallest place to explore, not having many locations to look through.  The Black Family’s home has several rooms to look through (which I will hopefully detail a bit later in the post for Sirius’ specific dreamscape) and the entirety of Hogwarts’ castle will be available (along with some parts of Hogsmeade in regards to places like the Shrieking Shack).  For the Hogwarts section, it may be possible for the visitor to find the Marauder’s Map, which will make it much easier to find certain people or places in order to find specific memories.