Type O's are outgoing, and very social. They are initiators, although they don't always finish what they start. Creative and popular, they love to be the center of attention and appear very self confident.
People with blood type O people are outgoing, energetic and social. They are the most flexible of the blood types. They easily start up projects but often have trouble following through because they give up easily. They are flighty and not too dependable. O types always say what's on their mind. They value the opinion of others and like to be the center of attention. Also, people with O blood are extremely self-confident.
Type O, the most "average" blood type, is considered the best type in Japan.
Quatre, Sailor Moon, Saito Hajime, Kamiya Kaoru, Tamahome
O is most compatible with O and AB.