Even if this is your first visit to Aomori and you have no idea where to go, she'll be all right!
Just jump on The Nebutan Go.
The route of this sightseeig bus covers almost every spot that the people visiting Aomori for the first time should walk around in the city.
The bus starts from Shin-Aomori railway station where you probably get off the Shinkansen (the Bullet Train) from Tokyo or somewhere else.
Unfortunately, there is no English guidence on the bus and no route map written in English either at this stage, however you don't have to worry about it too much.  The people from other sides of Japan don't understand the language spoken in Aomori, either.  Nevertheless, they are enjoying their holiday here.
Just have a try!  Chances are that you might be able to find your mates to walk around together on the board.