The Shut-In Princess of Eientei

Biodata

Feature	Information
Name	Kaguya Houraisan 33
Alias(es)	The Shut-In Princess of Eientei 33
Species/Race	Hourai Human; became immortal after drinking the Hourai Elixir 48
Gender	Female 33
Residence	Eientei, Gensokyo 33
Affiliation	Myriad Worlds Chat Group 33
Occupation/Role	Chat-group member, outside-world media enthusiast, and frequent commentator on cross-world events 34 48
Status	Active; possesses an immortal body that neither ages nor dies 48 217
First Appearance	Chapter 33

Background / History

Kaguya resides in Eientei in Gensokyo, where she spends much of her time beneath a kotatsu with a handheld game console. She is described as a veteran internet addict and possesses media and other resources that drifted in from the outside world. 33 34

She joins the Myriad Worlds Chat Group alongside Homura Akemi. Immediately recognizing Lin Xiao's Ultraman Gaia avatar, Kaguya realizes that the group connects worlds she knows through games, manga, anime, and other media. She openly tells the members that their lives are fictional works from her perspective, while also acknowledging that Gensokyo could be fictional from someone else's perspective. 33 34

Her knowledge makes her a valuable—if disruptive—source of future information. She identifies figures such as Starlight, Aizen Sōsuke, Daigo Madoka, Lelouch, and the members of the Seven before they reveal their identities themselves. 57 77 102 118

Appearance

Kaguya is repeatedly described as exceptionally beautiful, with a stunning face and beautiful eyes. 33 60

• Often depicted in Eientei wrapped in a kotatsu blanket while gaming. 33
• Carries herself with exaggerated aristocratic flair when praised for her beauty, including producing a folding fan to cover part of her face. 60
• Her beauty is considered dangerous enough that Batman worries public idolization of her could cause large-scale social disorder. 139

Personality

Kaguya is an unrestrained shut-in, avid gamer, and spectator who enjoys drama more than decorum. She habitually treats serious cross-world crises as entertaining scenes to watch, providing running commentary, teasing participants, and eagerly requesting tickets to major battles. 48 54 59 134

She is shamelessly opportunistic and quick to switch from arrogance to surrender when confronted by overwhelming power. After seeing Lin Xiao's Shining Form, she immediately apologized for her prior behavior and began calling him her “real dad.” 43

Despite her tendency to stir up chaos, Kaguya has strong disgust for cruelty and exploitation. She harshly condemns Vought and the Seven after recognizing their true nature, rejects slave-trading villains, and consistently supports Lin Xiao's side regardless of conventional distinctions between heroes and villains. 57 77 189

Abilities & Skills

Hourai Immortality

Kaguya drank the Hourai Elixir, granting her an immortal body that never ages or dies. 48

• Claims that consuming her flesh could grant eternal youth and immortality. 48
• Her attempt to upload her flesh to the Chat Group store was rejected as a “bloody illegal transaction.” 48
• Her immortality makes Lin Xiao consider her safe enough to accompany dangerous cross-world outings. 172

Outside-World Media Knowledge

Kaguya has extensive knowledge of other worlds through games, manga, anime, and doujinshi that reached Gensokyo. 34 35

• Identifies characters, hidden identities, organizations, and future events before many group members learn them themselves. 57 77 102 118
• Uses her knowledge to warn Starlight about Vought and the Seven's corruption. 57
• Provides tactical and genre-based commentary on Ultraman battles, including Five King's expected threat and Gaia Supreme's undefeated record. 103 214
• Her knowledge is incomplete when the original source material remains unfinished; she cannot provide Imu's unrevealed abilities. 193

Equipment / Items

• Handheld game console — Used while lounging under Eientei's kotatsu. 33
• Outside-world media archive — Includes games, manga, and a large collection of doujinshi stored on her computer or hard drive. 34 35
• Folding fan — Used to theatrically accentuate her self-proclaimed aristocratic beauty. 60

Relationships

• Lin Xiao — Her group owner and chosen allegiance. Kaguya declares that she will stand wherever he points and calls herself his most loyal “leg accessory”; he frequently mutes or threatens to mute her for disruptive behavior. 36 43 77
• Eirin Yagokoro — An Eientei associate who witnesses Kaguya's tantrums and considers her internet addiction beyond saving. 33 36
• Yukino Yukinoshita — A frequent target of Kaguya's teasing over outside-world fan works. Yukino strongly approves when Lin Xiao mutes Kaguya and later angrily reprimands her vulgar remarks. 35 36 143
• Batman — A fellow group member who is wary of her provocations and believes her beauty and thrill-seeking personality could become a societal threat if left unchecked. 34 139
• Daigo Madoka — Kaguya enthusiastically recognizes him as Ultraman Tiga and repeatedly comments on his battles and expected future as part of the “Heisei Three Thugs.” 102 103 124

Story Role / Major Arcs

Joining the Myriad Worlds Chat Group

Kaguya enters the group as the “Shut-In Princess of Eientei,” immediately recognizes Gaia, and reveals that she knows the other members as fictional characters. Her claims trigger confusion and existential discomfort among the group. 33 34

Doujinshi Incident

She offers explicit fan works involving Batman, Joker, Naruto, Sasuke, and Yukino, then continues teasing Yukino despite Lin Xiao's attempt to defuse the situation. Lin Xiao mutes her for twenty-four hours, leaving Eientei temporarily quieter. 34 36

Magical Girl Crisis Commentary

Kaguya comments on Homura's situation through her knowledge of Puella Magi Madoka Magica, dismissing conventional solutions and proposing that Madoka simply be hidden away until Witch's Night passes. 37

Ultraman and Tiga World Events

Kaguya serves as the group's most vocal tokusatsu commentator, reacting to Lin Xiao's Shining Form, identifying Daigo as Tiga, explaining the “Heisei Three Thugs” nickname, and celebrating the brutal defeat of Five King. 43 102 103 124

Cross-World Excursions

After repeatedly complaining that she is bored of gaming in Eientei, Kaguya receives points from Lin Xiao and later joins cross-world operations. She agrees to participate in the Monster Association raid after Lin Xiao promises a global livestream, and is later permitted to join the Gotham outing against Zod. 59 134 139 172

One Piece World Vote

Kaguya votes emphatically to expel the “Descendant of the Creator” from the chat group, then celebrates when Ichigo's presence successfully stabilizes a cross-world passage to the One Piece world. 192

Notable Quotes

“We're all two-dimensional characters, so life still has to go on! Don't worry about those vague and intangible things. Being happy is what matters most!” 34

“Do I even need to choose?! Of course I'll stand unwaveringly and without hesitation on Lord Lin Xiao's side!!!” 77

“With a god-tier lineup like this! Forget some King of the World Imu! Even if that original author who hasn't finished updating personally jumped out of the manga, we could pin him to the ground, beat him up, and force him to release more chapters, okay?!!!” 193

Trivia

• Kaguya attempted to sell her own immortal flesh through the Chat Group store to obtain points, but the system rejected the listing. 48
• She wants to become an idol through the Hero Association, though Batman considers the potential fanatical reaction to her beauty a global-level risk. 139
• She is repeatedly muted or threatened with muting because of her vulgar jokes, spoilers, and relentless teasing. 36 101 143
• Her preferred response to difficult situations is often rapid surrender, which other members describe as flexible and shameless survival philosophy. 104