This looks neat and I love the scan you chose (it's a he, not a she, lol) but to have a fully incorporated character, some proper lighting is necessary - since the moon (the main light source) is behind the character, the character's face and front should be darker/in the shadows, while his edges (face, hair and clothes) could use some of those light blue highlights from the moon. The same applies for the edges of the window, too.
Overall, nice job, it just needs some more tweaking to look really complete. Keep it up!