Neither of them are any characters in particular - they're just random.
Annoyed - No idea
why he's so narked. This one started as just an idle sketch, but I surprised myself as I added more to it - there's no texture in it but the stark outlines seem very effective to my eyes.
Pensive - A Cartelian Glukk deep in thought. This one too was just going to be an experiment until I actually got absorbed in it - I was trying out my coloured pencil techniques, in particular shading with them and using them in layers.