A Blood Types are usually seen as calm, composed, and very level headed & serious. With a firm character, reliable & trust worthy (also hardheaded). They think things over & make plans deliberately and they plug away at things steadily & assiduously. They try to make themselves more like to their own ideal of what they should be. A types may look aloof or somewhat distant to others. They try to surpress their own emotions, and because they have continual practice in doing this, this makes them appear strong. But... actually, they have a fragile, nervous side as well. They tend to be hard on people who are not of the same type and consequently tend to be surrounded with people of the same temperament.

B Blood Type; - Rajura / Dais - Seiji / Sage -

B Blood Types are curious about and interested in everything. But they also tend to have too many interests and hobbies as they tend to get excited about something suddenly and then drop it again just as quickly. But they do manage to know which of their many interests or loved ones are the ones that are the really important ones, the ones they should hold on to. B types tend to excel in things than just be average. But they tend to be too involved in their own world or become carried away with some thing and neglect other things. They have the image of being bright and cheerful, full of energy and enthusiasm, but some people think that they don't really want to have much real contact with others.

O Blood Type; - Ryo - Anubis / Cale - Shuu / Kento -

Type O's are said to set the mood for a group and to take on the role of creating harmony among its members. Their image is of one taking it easy, of being peaceful and carefree. They are also thought to be big hearted and benevolent, and they tend to spend money on others generously. O types are generally loved by all. But, they also, surprisingly, have a stubborn and strong willed side, as well, and tend to secretly have their own opinions on things. They are easily influenced by other people or by what they see on TV. They seem to appear level-headed and trustworthy, but they often slip and make blunders inadvertently. But that is also the point that makes O types lovable.

AB Blood Type; - Naza / Sekhmet - Touma / Rowen -

People with this blood type are said to be to have a delicate sensitivity. They are considerate of other people's feelings and deal with them with care and caution. On the other hand, though, they are strict with themselves and those close to them. They therefore, seem to have two personalities; one for those outside and the other for those on the inside. They often become sentimental, and they tend to think too deeply about things. AB Types have a lot of friends, but they need time to be alone and think things through, as well.