Mai Kawakami is a girl with a special ability, and she is a second-year high school student at Hosea Academy. She fights the Phantoms along with Haruhiko Ichijo as a Phantom Hunter of Team E. She is one of the main characters of the Musaigen no Phantom World series. Mai has a lively, upbeat personality, and she is very confident in her skills. However, she is also very kind and caring. She is rather active, fit and strong; often fighting the phantoms using only her legs and sometimes hands. Even as a child, Mai possessed great strength. She is very straightforward and she is the one that will do what she has to even if it’s a bit embarrassing, but she’s also very determined to get into the phantom jobs. Mai is also very mature, calm and popular, and she has even earned herself the nickname "Phantom-hunting mom". She is very understanding of situations and can sympathize with others. Mai is also very supportive of her friends, but doesn't particularly like people with selfish and rude personalities. She is also very close with Haruhiko, but she does enjoy to tease him sometimes. Since she is very confident in herself and skills, Mai will usually take on opponents that she think she can handle by herself since she doesn't want to put her friends her in danger. But since Haruhiko works well with Mai, the two often ends up working together. Even though she lives alone, Mai has remained relatively cheerful. She relates to Haruhiko because they have quite similar pasts. She acts like a big sister to Reina, whom she deeply cares for.