Alisa Mikhailovna Kujou - A model student at the top of her class and currently the accountant for the student council. She is also known as the solitary princess, one of the two "beautiful princesses" of Seiren Academy. While she often scolds Masachika about his behavior in Russian language, sometimes...

Masachika Kuze - An unmotivated underachiever who routinely stays up late indulging in his nerdy hobbies. The girl who sits next to him in class, Alisa a.k.a Alya, constantly gets after him. While his grades may be on the lower end, he actually understands Russian.

Yuki Suou - A proper young lady from a family of former nobility. She is the student council's publicist and Masachika's childhood friend. She is also known as the noble princess, one of the two so-called "beautiful princesses" of Seiran Academy alongside Alisa.