Best for east facing window

Could you help me with the best bonsai for an east facing window. 
The window is in the bathroom and is normally a cool place but during a bath or shower it’s humid. 
Thank you 

There are no best trees for indoors. Just the least bad options. I would say ficus.

If you are serious about bonsai development, grow locally hardy trees outdoors. Then cultivation is not a problem and you can focus on development.

Hi There,

    I have a large “”s-shaped” ficus.  I have one side facing a sunny/bright window, the other side facing the room.  I notice there is much more growth on the side facing the window, while there is minimal (but still some) some growth on the inward side facing the room. 

   Should I be turning it around giving equal exposure to both sides?

    Thanks, Michael 

If you are in the nortern hemisphere, now is summer and ficus should be outdoors.