The heroine of this story. Having finally become lovers with the protagonist as an adult, she just wants to flirt and be affectionate, but she is constantly jerked around by characters who intrude regardless of the time or place.

"At that moment, a man clad in a robe entered the establishment." A robed man who mainly appears in taverns, serving as an assassin or an information broker. He excels at ruining the atmosphere of a banquet.

Gald. A thuggish man who appears everywhere from school rankings to adventurer guilds. His specialties are picking fights like a delinquent and shouting classic lackey parting threats.

"E-Emergency! A swarm of three thousand monsters is approaching from the west!" A soldier of the Kingdom Knights who always rushes in frantically to report monster attacks, the return of the Hero, and so on. His specialty is stumbling over his words.

A classmate who enters the classroom even if it's after school and no one is there, or even if a post-apocalypse has occurred. Since they appear even when nobody is supposed to be around, they are probably not human.