Because you are writing a story, your word choice here will vary greatly by your writing style and the nature of your character (who is speaking in first person). Other answers here have already given good choices for words that describe the physical phenomenon of your reflection appearing over your surroundings, but you have an opportunity to color your character through the narrator's word choice here.
I peered through the window with the slick navy blue curtains, swinging to and fro to the movement of the minibus, blocking my view to some extent. I could see my vague reflection on the misty window ______ my surroundings.
- draped quietly across
- shyly coloring
- mingling among
- dancing through
- gazing back from
One approach to the word choice problem here that would work well is to choose an action that echoes the character of your narrator and turn it into a metaphor. There are so many ways to do this that I'm not confident I can pick the best metaphor for your character. Hopefully the examples I've given put you on a productive track.
Alternately, if you really just want to describe the lightness of the reflection, consider "obscured among" or "hidden among".