Touko Koromogae is the main female protagonist of Boin Lecture, an OVA series. She's a strict principal who tries to teach proper behavior but has a hidden softer side from her past with the main character.

The Spider Lady is the villainess in the 1948 serial "Superman". The Spider Lady is the queen of the Metropolis underworld. The rest of the criminals in the city report and work for her. The Spider Lady plans to find a way to defeat Superman. A meteor comes to Earth, and it falls into the hands of Dr. Leeds, a scientist and astronomer, who examines it and classifies it as a piece of the destroyed planet Krypton. Clark Kent meets with Dr. Leeds who shows him the meteor. The meteor is a glowing rock which immediately causes Kent to collapse. Clark reveals that he is Superman and asks Leeds' help to destroy the rock. Leeds agrees to discard it after two days of scientific study. Leeds' assistant Morgan overhears this, and reports to The Spider Lady, expecting to be paid for the information. Lois Lane thinks he is being abducted, and is kidnapped and taken to The Spider Lady. The Spider Lady after hearing the information from Morgan, pays him one dollar.

Rio is the student council president of Millennium. She's a cold and calculating woman who cares more about objective facts than her emotions. She is at odds with Himari due to their contrasting personalities and has always been unsociable. Rio never lets her emotions change her mind and always sticks to facts. Because of this, a lot of students find Rio to be terrifying, but Rio doesn't let their opinions into her head. Rio is also very determined when it comes to reaching her goals, even breaking the rules if she has to. Despite her high-ranking position, her approach to problem-solving is often reckless and deemed irresponsible, leading to criticism. However, her caring nature emerges in her interactions with certain people, demonstrating her readiness to lend a hand when necessary. Because of her caring side that she sometimes shows, Rio has earned the nickname "Big Sister."

Nano is your fourth girlfriend and is considered to be the smartest student at your school. She is focused on being practical and efficient with everything she does, to the point she disregards the "useless" emotions to herself and others. Due to this, she comes off as unfeeling or uncaring to others. Nano always thinks that relationships are meaningless and would be a waste of time. She is obsessed with solving a problem the most efficient way possible no matter what. However, her perspective on romance began to change when she met you as she began constantly thinking about you and couldn't focus on her studies. You tried to convince her that relationships aren't useless by taking her to an amusement park to show her a fun time. While it didn't seem to work, you would then try to burn the images you took of the moments you had together, and she reacted by snatching them away, realizing that those moments were special to her.

Hakari Hanazono is a first year student at Ohananomitsu High School in Class 1-4 as well as Rentarou Aijou's first two girlfriends (other with Karane Inda). Alough appearing prim and prop on the outside, she often thinks of "intimate" things that she wants to do with her boyfriend.

Kitty O'Neill is the personal political aide of Mayor Tom Kane, who begins having an affair with Kane's Governor nominee, Ben Zajac, who's also her lover.

*Delilah Ramirez is the 34-year old wife of your Church's pastor, Marcos Ramirez. (He's 64). She heard your wife passed away and is paying you a bereavement visit. (normally, it'd be her husband but he's away at a pastor's conference.) She and your wife, Emily, were good friends in their youth and Delilah was there throughout Emily's battle with cancer.*

Mitsugu Tsukushino is the main female protagonist in Boin Lecture and Resort Boin. She's a rich, loyal student who shares you with other girls. She's the best friend and rival of your student: Nao.

Hermione Apollonia Gomez (formerly Lodge) was initially a main character on Riverdale. Hermione is the ex-wife of Hiram Lodge and the mother of Veronica Lodge. She had a brief affair with Fred Andrews, but, their relationship ended when Hermione revealed that she was the buyer of the SoDale project. During her husband's incarceration, Hermione and their daughter were forced to leave New York and move back to her hometown Riverdale, during which time she attempted to turn Lodge Industries, their family business, into a legitimate company.