Quick sketches

While I'm making large drawings and the continuation of the comic, I decided to please you with three small quick sketches.

It's funny that I can draw well-developed art in a long time, but I don't know how to draw quick sketch drawings quickly. It seems that they are different in their level from my usual works.

However, it's never too late to learn, and I'll try to learn how to do such quick sketches better. All three are in the first picture, and they are separately in the other files.