He has somewhat curly brown hair, green eyes, lightly tanned skin, and wears a khaki-colored uniform with his sleeves rolled up to his elbow. He is often depicted with his favorite food, tomatoes. In the profile image at the right, he is wearing a bullfighter uniform (from the Children's Day sketch series).
Spain's skintone has alternated between fair and olive. He's said to always look happy, even without reason.
A cheerful country bumpkin, Spain was once a super powerful nation and traveler until he was tormented by England and Netherlands, beaten by a younger America, and thrown into war and poverty. Despite all his hardships, he remained optimistic and passionate. The source of his constant happiness is the sunshine that casts over his land.
Although he means well, he happens to come off as insensitive and clueless at times because of his inability to "read the atmosphere" (it is said that he does not even try to assess the situation). Spain speaks in the Osaka-ben variant of the Kansai dialect in the Japanese version of the manga and anime.
He is also very fond of children, especially the Italy brothers. It is shown that his ultimate dream is for both of them to live with him.
Spain is often shown spending time with either Romano, France, Prussia, Belgium and Netherlands.
It has also been stated that he tends to get sentimental if he drinks, but when he gets completely drunk he "becomes so scary he can even change Sweden's facial expression\".