北条司是O型血的信息:
https://web.yonsei.ac.kr/ibody/abo_fan/o-e.htm
Tsukasa HOJO -- Cat's Eye, City Hunter
It is Mr. Tsukasa Hojo, after all, that my favorite Type-O manga writer. His most important works: 'City Hunter' and 'Cat's Eye'. Strongly purpose-oriented Ryo Saeba and Cat's Eye's sisters carry through even the most difficult missions.
It looks like Type O that they are concerned with men and women difference. On the contraly, Type ABs virtually don't care about it. Type A maybe says "a man (woman) should be like this or that!"
Like Type O, heroes and heroins show one's emotions directly. But their emotions don't drag on. On the contraly, Type A's emotion does.
