He has light, shoulder-length blond hair and green eyes.
He was once a super nation that controlled Middle and Eastern Europe with his partner Lithuania in the Middle Ages, until Russia split them apart and he was annexed. Despite this, he kept rising back (described "like a phoenix"), noting that Poland is a very strong country.
It is troublesome for others to get to know him, as he acts shy and has anxiety towards strangers. However, if he's used to someone, he will never let go and will act troublesome. He is a cheerful, somewhat selfish man and rather forceful with his opinions. Because he's short-sighted and impulsive, other nations can easily take advantage of him.