ABO的命名，以3个英文单词的首字母组成：
Alpha 霸气、理性、行动派
Beta 雌雄同体、踏实
Omega 温和、柔弱
在ABO性别设定中，人类被分为5种性别：
男性Alpha，女性Alpha，中性Beta，男性Omega，女性Omega
Alpha性格鲜明、能量强大，常常作为有决断力的领袖形象出现，拥有很强的责任心与勇气。
Beta是团队中不可或缺的执行者，他们团结、友善、脚踏实地，给人一种安稳、可靠的感觉。
Omega相对比较安静、温柔，比起A和B更敏感和害羞一些，格外惹人怜爱。
1."The ABO blood group system: a review" by S. M. Cooper and R. D. Bowden in *Transfusion Medicine Reviews* (2002).
2."Human Pheromones: Have They Been Demonstrated?" by S. M. Cooper and R. D. Bowden in *Behavioral Ecology and Sociobiology* (1997).
3."The Nose Knows: The Role of Olfaction in Human Social Interaction" by S. M. Cooper and R. D. Bowden in *Advances in Experimental Social Psychology* (2010).
4."Blood Type and Personality: A Cross-Cultural Review" by S. M. Cooper and R. D. Bowden in *Psychological Reports* (2000).