Arrogant scientists...well. They might not always be the most pleasant types, but Harold was somehow tolerable despite his misanthropic tendencies, insistence that he was the smartest person in the room, and felonies against proper grammar. Maybe Donnie was inclined to go easy on him because he'd been one of the first (and only) friends outside of his family that he'd been able to make, or maybe it was just that the whole "helping to stop the Technodrome and save the world" thing proved Harold was pretty decent at heart, but...

Yeah, he couldn't deny that the guy was kind of a pain in the neck.

"Most people haven't, even where I'm from." Though in a place like this, probably best to clarify that - "New York, Earth, early twenty-first century. I'm a mutant, hence the...talking."

And the size (even if he was still kind of a shortie). And the ninja skills. And the everything.