Larry

Because he was intentionally drawn with a lighter ink stroke, I thought I'd give you a close-up of Larry in today's strip.

Also: It's entirely possible that this is Larry's second appearance in the strip. (I can't find the strip, but there's one where Arthur's explaining flight to Flaco, when Larry bonks right in front of them. Know the one I'm talking about? Link to it, below, if you do!)

Edited to add: Sheldon forum user "LizardKirk" found Larry's earlier appearance. Thanks!