Looking good.

You might want to add a little more drama to one or two panels using different lighting and/or camera angles. One of the tricks to making a character seem lost or alone is to make them appear insignificant compared to their surroundings.

The sketch above is terrible, but maybe it will help with visualizing what I'm trying to say? Make the halls appear more imposing than the figure. Make them stand out more by making the character in siloette or use a camera setting of 25 to give a more forced perspective.

It's not much, but I hope it helps add a little more umph! to what appears to be a great start.