This is probably my first and last ref that includes the side view.

Rain Kero (he/they)

He's a chill, fat, and large
Diesel Protogen (Dieselgen) who works as a young deliveryman, and loves having conversation, specifically tech and stories.

Rain's known to be a really lax guy and is an involuntary pillow. They like to eat RAM and other consumables.

You can open Rain's visor, with his consent, to cook or toast food! (He's a portable and wireless microwave and toaster)

When agitated or angered or simply working hard, he lets out exhaust from his exhaust pipes.

Credit to  with.luck for helping me making the main design, which was redrawn and changed slightly by me.