Andy had come from Southtown in the United States to train under the orders of Hanzo Shiranui in Kopo-ken. Mai then had to take alternate courses from her grandfather's friend, Jubei Yamada in Ninjitsu. However, far from hating him, Mai fell instantly in love with the American kid, since he was suitably strong and handsome. However, Andy paid little attention to Mai, too absorbed in his training. Mai, on the other hand, had even made plans as to when Andy would marry her.
After they grew up, Andy became a good-looking young man, and Mai a very attractive woman who received marriage proposals from dozens of men. However, Andy decided to travel back to the United States and reunite with his brother Terry Bogard to exact revenge on Geese Howard, the man who killed their father.
Mai was infuriated by this desertion, but had no choice but to stay and keep training. She knew that Andy would come back one day. Not much time later, Andy returned to Japan in order to continue his training. He found out that his fighting in Southtown had been for the wrong reasons; not for the real sense of fighting, but for personal vengeance. In addition, Andy left Southtown with unresolved emotional problems and a resolve to gain honor in fighting. Mai did not care for any of this, she just wanted Andy to be close to her again. So, when Wolfgang Krauser decided to go out in search of worthy fighters, she followed Andy to fight Krauser. After the journey, Mai felt even closer to Andy, and thought it was the time to wrap things up.
However, by 1996, Yuri was obliged to take her father's place in the Kyokugenryu Team, and King and Mai were left without a third team member. When Mai seemed hopeless, a strange woman attacked her. Mai avoided the attack and prepared to fight. The woman praised Mai's skills and introduced herself as Kasumi Todoh, the new third member of the team. Once more, the Gorgeous Team was back in action; but by next year, King and Mai were in trouble again, as Kasumi was still looking for her father. They resigned themselves to losing the tournament that year. King had to take care of her brother, Jan, anyway. However, Chizuru Kagura intervened, and told Mai and King that she would gladly be the third team member, and that she would take care that Jan would go with them.
Mai used the two year recess to go back to Japan and perfect her Ninja skills, and to spend some more time with Andy. Mai insisted in that next time, she would team up with Andy, which he took more as a joke. However, a stroke of luck enabled Mai to finally accomplish her wish: an invitation for another King of Fighters tournament, with a new four team member rule. Mai lost no time in joining along with Andy. However, after the tournament, Terry disappeared under the ruins of Krizalid's base (the tournament's host). Mai's high spirits were dampened by the task of trying to reassure Andy that Terry was not in fact dead.
Even though it hurts to leave her beloved one once again, Mai has decided to abandon the Lonely Wolves team. After finding out that Terry was in fact alive, Mai and Yuri reunited after a long separation. They decide to team up once again, since they miss the fun times way back when the King of Fighters tournament was just beginning to grow. They also decided to accept Kasumi along as well, but this left one gap in their four person team. The final member appeared soon enough, during an audition in Japan, where they saw a peculiar little girl named Hinako Shijou. Mai was so impressed with her skills, that she was taken in as the fourth team member. Hinako Shijou also fought in the next tournament with Mai, but Yuri decided to return to the Kyokugenryu Team because of Robert Garcia being in distress, so Li Xiangfei would take Yuri's place.
In The King of Fighters: KYO, an RPG game centered on Kyo Kusanagi and settled right in between KoF'96 and KoF'97, Mai isn't a playable character, but she and other fighters provide Kyo with info and help during his trials, specially when his girlfriend Yuki is kidnapped and taken abroads. Mai is also present in one of Kyo and Yuki's dates after the incident, when she treats them to a tea ceremony.
Her costume is usually a sleeveless, skimpy red outfit or tunic. The costume is held at her waist by a decorative waistband, often with long, trailing decorative tails, leading down to a loin cloth with a thong underneath (or mini-shorts in the US version). Her footwear for Fatal Fury 2, Fatal Fury Special and The King of Fighters games is a pair of soft-soled ninja tabi. From Fatal Fury 3 onwards into the Real Bout Fatal Fury games, she wears instep guards that leave her heels and the front parts of her feet exposed. In Fatal Fury 3, she also wore a red vest, which was abandoned later on. She also wears heavier eyeshadow.
In KOF: Maximum Impact, her alternate costumes portray her with very short, boyish hair and ninja outfits that resemble that of Kasumi from the Dead or Alive games. In KOF: Maximum Impact 2, one of Mai's second outfit color schemes is exactly Andy's standard palette, even giving Mai blonde hair. Also, another of her outfits bears a resemblance to Lum Invader from Urusei Yatsura (long green hair, clothes sporting tiger prints, and her hairpin even makes it look like she had small horns). This costume is also considered to be a cosplay of Cham Cham from SNK's Samurai Showdown series.