Prussia's epic way of saying "me." Prussia is a character from hetalia, an anime and web comic that personifies countries and uses them as characters.
Prussia is a narcissist albino who is usually seen with a yellow chick (gilbird) sitting on his head. His "human" name is Gilbert.
Today I was AWESOME.
"Oresama" is both an overly-self-confident and narcissistic way of saying "me" in Japanese.
Miyavi said when asked, Special Talent: oresama