MEM-cho

Introduced in Chapter 3 "Love Reality Show Arc" as a YouTuber. Stands at 155 cm tall. Her stage name is "MEM-cho," though she is also simply called "MEM." Her real name has not been disclosed at this stage. She has a petite and cute appearance, almost always wearing a headband shaped like black devil horns. At first glance, she seems laid-back, but in reality, she can objectively assess her surroundings and possesses sharp judgment and initiative, which have helped her gain popularity through online marketing and self-promotion, self-proclaimed "pro at going viral."

Initially introduced as an 18-year-old high school senior, her actual age is 25, having lied about her age by seven years (described in the story as "exaggerated"). Originally a fan of the idol Ai from B Komachi, she aimed to become an idol herself and attended auditions. However, when her mother fell ill during her senior year of high school, she took a break from school to earn tuition for her younger brothers, as they were from a single-parent family. Thanks to her efforts, her brothers were able to continue their education, and her mother recovered, but by then, she was 23 and too old to audition for idols. Instead, she started streaming, claiming to be an active high school girl, which unexpectedly became very popular and she couldn't back down.

She appeared as a cast member in the love reality show "Starting Serious Love Now" (ImaGachi) alongside Aqua and Akane. After the show, Aqua invited her to join "B Komachi," and she began her path as an idol, which she had once given up on. The original author, Akasaka, initially planned her to be a guest character only for Chapter 3, but was impressed by the character design developed from Akasaka's name by another designer. Inspired by her line in Chapter 3 to Aqua, "Do you want to do ImaGachi from our perspective?" Akasaka recognized her as a necessary talent for "B Komachi," and she was promoted to a regular and then one of the main characters due to how well she fit into the subsequent developments.

After joining "B Komachi," she used her life experience as an elder and her analytical skills as a YouTuber to contribute to the production of B Komachi and act as a mediator in human relationships, particularly concerned about the love triangle between Aqua, Akane, and Kana. Her member color is yellow. Her singing is better than Ruby's but still in the so-bad-it's-good category.

She gets along well with Ruby, as they are both idol otakus. She calls Aqua "Aku-tan" and Kana-Arima'>Kana Arima "Arima-chan."

On the official anime website, she appears as a Vtuber, regularly delivering the latest news related to the anime and events through videos, and she continues to stream regularly even after the end of the first season of the anime.