A cute, bubbly, loud cadet-type with little combat experience. She gets peoples' attention by saying 'neh-neh-neh,' and has the amazing ability to hide multiple items behind her back, only to whip them out in rapid succession. She seemed to develop feelings for Asuka in the series but only sees him as a teammate instead.
When Shin Asuka's jet was shot by multiple Spheres and was stranded in space, he was taken to the TPC Hospital where Mai took care of him. After TPC Base on Mars was attacked by Darambia, Super GUTS went to Mars to destroy the Monster. After Kohda and Asuka's jet was blasted down, Asuka got out and mysteriously transformed into a Giant of Light. After they got back to base, Mai decided to name the giant Ultraman Dyna.
- Mai is the one that gave Dyna his name and because of this, she is sometimes referred to as "Dyna's Godmother" (ダイナの名付け親 Daina no nadzukeoya).
- Mai's little brother Hiroki in the episode 47 of the series is portrayed by her actress' real life younger brother.
- Mai's actress, Mariya Yamada had once dated Takeshi Tsuruno, Asuka's actor. Of course, they never ended up in love with each other, which in fact was referenced by their characters in the series.
- While Mai seems to have finished school education, in real life, her actress is a high school drop-out.
- Mai was meant to have her return in Ultraman Saga. This never made out due to her actress Mariya Yamada being pregnant at the time of the recording.