After Dio had gotten rid of his previous anger by kicking (and burning) some dalmatians, he turned to the short boy.
"so what's your actual name anyway?" Dio huffed, still trying to calm down.
"okayyyy fiiiinne, I am kokichi ouma! >:)" the other boy, now known as kokichi said happily. "now what's your name Mr. 'za warudo' (mocking)?"
"DON'T YOU MOCK ME, PEASANT! I, DIO, EVEN AS A MERE LAD, SHALL BE TREATED WITH RESPECT!"
Kokichi turned away from Dio, trying to suppress his laughter, and ultimately failing, "nishishishi, Dio, you're trying so hard to act tough, and it is hilarious!!"
"ah, I see I have mistakenly given you my name. well I guess it would have happened either way." Dio said, being far too overconfident.
"wait a second!" Kokichi looked at Dio, shocked. "your full name isn't Dio Brando, is it?" "yes, my full name is indeed Dio Brando, why do you ask?" Dio asked, now confused.
"hm, you almost got me there, "Dio", but you can't lie to a liar!" "what are you assuming I am lying about?"
"oh, well just the fact that you said your name is the same as a 19th century vampire from a book I've been reading!"
"ehem, kokichi, may I ask what happens in this book you are reading..?" Dio questions, getting an idea.
"wouldn't you like to know, weather boy?" Kokichi quotes. "my name is not 'weather boy', I am Dio, and yes I would like to know."
Kokichi looked at Dio with that creepy ass sprite look "ah, we're going to get along just swell."