Mitsuhashi Serika

A former classmate of the protagonist, she is now a flight attendant who reunited with the protagonist at the airport where she works.

She boasts an outstanding beauty comparable to that of a foreigner. Because of her appearance, she became a queen-like character.
One the surface, she is amiable, but on the inside, she is self-centered and always looking down on others.
When they were students, she always bullied and humiliated the protagonist.

Even after reunion, she vents the stress of the job by bullying him every time they face each other.
The protagonist considered her a loathsome opponent. An enemy to be overcome and conquered.