Mizuho Kazami is a central character in the anime series 'Onegai☆Teacher'. She is an alien observer sent to Earth, who ends up becoming a high school teacher. Mizuho is known for her gentle and caring personality, but she also carries the burden of keeping her extraterrestrial origins a secret. Her dual life becomes even more complicated when she marries Kei Kusanagi, a student at the school where she teaches. Mizuho's presence drives the narrative, as her marriage and efforts to maintain her secret form the backbone of the series' romantic and comedic elements.