The character (both sprite and portrait).
I enjoy the sprite yet the portrait not so much. Maybe it's the lack of detail.
Something to help you about that character:He is actually a virus. Because I couldn't think how a virus would look like I decided to make him look like an droid knight.
I am telling you this, because maybe you have any ideas of details to put at the portrait. Also how to improve it in general.
Edit:Better lighting and shading.
~Thank youu.