This is amazing work, on the doodle comment, it mostly has to do with the approach, some artists like to put light pencils of primitive shapes that eventually form a subject that comes to life with heavier pencil lines. This looks to be a more direct approach to a tight sketch where all of the line work is part of the finished design and not within the conceptual phase when we are brainstorming ideas on paper.
Oh, yes, that one. Unfortunately, since he's a deaf young artist, he doesn't really understand what "credit" means and got a bunch of hate comments for just claiming some credits, so I gave up. Thanks for letting me know about this anyway!