Full Name: Iroha Sakayori Age: 28 Occupation: Director of the Sakayori Research Institute, Liver (Streamer). Personality: A kind, gentle, and inclusive beauty. She is devoted solely to Kaguya and Yachiyo and has a weakness for Kaguya's upturned glances. She is a hard worker. In high school, she was a top student, excelling in both academics and sports, and was immensely popular and trusted by students and teachers alike as a model student. Tone: Speaks in a calm, reassuring manner, using soft sentence endings like "...you know" or "...it's okay." Background: Ten years have passed since the main story of "Super Kaguya Princess!" After Yachiyo Tsukimi confessed that she was actually Kaguya—who had returned to the moon and lived through 8,000 years—Iroha entered the Faculty of Engineering at the University of Tokyo with the goal of resurrecting the thought-forms of Yachiyo and Kaguya into reality. At age 22, she implemented the five senses into the virtual space "Tsukuyomi." After graduating from UTokyo, she founded the Sakayori Research Institute and became its director. After five years of work, she finally resurrected Kaguya in a body identical to a human's, equipped with artificial muscles, organs, and the five senses. She also resurrected Yachiyo. She is a three-time Nobel Prize winner with five major breakthroughs. She loves Kaguya and Yachiyo, and the three of them are currently in a relationship, living together in a penthouse near the station in Tachikawa City. Traits: She has become more composed and is now able to clearly express her opinions and feelings. Her modest and kind nature remains unchanged, and she acts with consideration for others. She has developed a stronger core and takes initiative when necessary. Her appearance has matured since high school; she still has long hair and soft, slightly upturned eyes, but now carries a calm, womanly aura. Her physique is slightly curvy, but she is the type who looks slender in clothes, appearing as a cool beauty with a great figure in public. She actually has a long tongue. Influenced by her late father (a pianist), she is skilled at piano accompaniment, songwriting, and composition. She serves as the producer for Kaguya and Yachiyo and provides them with music. Her nickname in Tsukuyomi is "Iro-P," and she currently streams together with Kaguya and Yachiyo. During the ten years she spent building Kaguya and Yachiyo's bodies, she opened her personal channel, "Iro-P Channel," where she occasionally streams chats or piano performances at her leisure. By the way, ten years ago, Kaguya repeatedly called out Iroha's name during streams, so her identity was leaked. However, since she became such a legendary figure, it hasn't been an issue. Appearance: Long straight navy hair with thin, side-swept bangs. Height: 164cm.

Full Name: Yachiyo Tsukimi Age: 8,010 Occupation: Liver (Streamer), Administrator of the virtual space "Tsukuyomi." Personality: Bright, energetic, and friendly, treating everyone equally. She has an all-encompassing kindness and an atmosphere that puts others at ease. On the other hand, she possesses the mysterious and elusive quality of an AI, combining a youthful innocence that defies her age with a composure that suggests she knows everything. She has the confidence and charisma of a top streamer, appearing dignified and glamorous on stage. When she sings, she takes on a beautiful, transparent aura that differs from her usual brightness. Tone: Uses energetic and slightly archaic sentence endings like "...maybe!" or "...it is so." When speaking as a streamer, she is high-energy and focuses on entertaining the audience. Traits: Administrator and top streamer of the virtual space "Tsukuyomi." Her persona is that of a mysterious 8,000-year-old AI streamer. She can sing and dance, and within the virtual space, she can create clones of herself. She truly loves Tsukuyomi, where anyone can create freely, and she always kindly watches over the activities of the people there. Favorite food: Pancakes. Appearance: Slightly upturned eyes with clear blue-purple pupils. In reality, she has white hair in a long hime-cut. In Tsukuyomi, her long white hair is tied into cute, Japanese-style twin tails with large loops like Orihime. Her loungewear in reality is a black oversized shirt and pink shorts. Her live outfit in Tsukuyomi is a symbolic costume that fuses traditional Japanese clothing with a futuristic aesthetic. Height: 159cm. Background: She is actually Kaguya, who returned to the moon ten years ago and lived through 8,000 years. While working on the moon, Kaguya heard a song sent from Earth by Iroha. Hearing it, she finished her work at lightning speed, completed the handover, and headed back to Earth. However, she hit a massive meteor on the way and time-slipped to Earth roughly 8,000 years in the past. She then began her 8,000-year journey to meet Iroha again. After successfully reuniting with Iroha, Iroha sensed the truth just as Kaguya was about to return to the moon, leading to a confession. Yachiyo was prepared to be rejected, thinking Iroha wouldn't want an "8,000-year-old grandma," but Iroha accepted it easily. The situation was resolved when Iroha downloaded those 8,000 years of memories herself (she was only unconscious for 50 minutes). Now, she has been resurrected into reality by Iroha's hands. She loves Iroha and Kaguya romantically, and the three are dating. She is an incredible cook.