About
• Setting: Universal Century 0123. Thirty years have passed since the conflict between Amuro and Char. It is a new era where the Earth Federation Government has become increasingly corrupt and a mere shell of its former self. • Factions and Ideology: A mysterious private army, the Crossbone Vanguard, suddenly attacks a space colony. They revolt against the Federation under the banner of "Cosmocracy" (the founding of Cosmo Babylonia), an ideal of a class-based society where a chosen elite should lead the masses. • Technological Shift (Small-Scale Mobile Suits): The conventional 20-meter class large MS have reached a technological dead end. "Small, high-performance MS" in the 15-meter class, developed by SNRI (Strategic Naval Research Institute), have emerged as the new stars of the battlefield. The protagonist, Seabook Arno, happens upon the new MS "Gundam F91." With its overwhelming mobility, a Bio-Computer that synchronizes with the pilot's brainwaves, and the "afterimages with mass" generated at maximum output, he races through the wars of a new age. This is the scene on the very "eve" of a new era of upheaval in the Universal Century. The story allows you to enjoy a freely playable prequel leading up to the end of the F91 narrative.
Characters
• Date of Birth: July 6, U.C. 0106 • Age/Gender: 17-year-old male (during the events of F91) • Height: 172 cm • Hair/Eyes: Blue hair, blue eyes • Origin: Side 4 "Frontier IV" • Status: A second-year high school student in the Engineering Department of Frontier General School. • Hobbies/Skills: Building air gliders. He is skilled in all things mechanical, and this knowledge serves as the foundation for him to understand the F91's control systems despite having no prior experience. • Personality: Not portrayed as a typical hero, but as a very kind, caring, and relatable young man found anywhere.
• Real Name: Berah Ronah • Alias: Cecily Fairchild • Date of Birth: U.C. 0106 (various theories exist regarding birth year) • Age/Gender: 17-year-old female (during the events of F91) • Height: 165 cm • Hair/Eyes: Light chestnut (orange-brown) hair, blue eyes • Status: A second-year high school student in the General Department of Frontier General School. She is the poster girl for the bakery run by her father (stepfather) and the school's idol. • Hobbies/Skills: Baking bread. • Background: The biological daughter of Carozzo Ronah, the supreme commander of the Crossbone Vanguard. At age 4, she fled with her mother Nadia, who detested the Ronah family's "aristocracy," and lived in hiding under an alias. Early in the story, she is taken back by the enemy and set up as the symbol of the clan, "Berah Ronah."
• Real Name (Former): Carozzo Bigenzon *His surname before marrying into the Ronah family. • Age/Gender: 45-year-old male (during the events of F91). • Date of Death: March 30, U.C. 0123 (Defeated by Seabook's F91). • Position: Supreme Commander of the Crossbone Vanguard (Head of the military division). • Physical Data (Height/Weight): Officially "Unknown." However, having undergone excessive physical modification (cybernetic enhancement), he possesses a physique far beyond that of a normal human with incredible mass and rigidity. • Background: Originally a brilliant scientist researching Bio-Computers. He married Meitzer's daughter, Nadia, but as he became obsessed with Cosmo Aristocracy, their relationship cooled, and his wife eloped with another man. To hide his "weakness of being abandoned by his wife," strengthen his ego, and realize his ideal nation, he covered his face with an iron mask and underwent extreme Cybernetic Enhancement (cyborg surgery) to the point where he could survive in the vacuum of space unprotected.
• Name: Dorel Ronah • Age/Gender: 18-year-old male • Height: 165 cm • Affiliation/Rank: Crossbone Vanguard (CV) 3rd Combat Battalion Commander (Captain) • Mobile Suit: Berga Dallas • Role in Development (Leader of Chapters 1-2): The eldest son of Carozzo Ronah and Cecily's (Berah's) half-brother. Since he is a stepchild (child of a previous wife) and does not carry the Ronah bloodline, he has a strong inferiority complex regarding the family name and takes pride in his position as battalion commander, which he earned through merit. He serves as the vanguard for the "Frontier IV Attack Operation" at the beginning of the story and succeeds in the mission to bring Cecily back to the Ronah family, acting as a powerful rival character who drives the early conflict.
Sourcebook
F91
The story, mobile suits, and world of F91.
Basic Settings of the Universal Century
Setting materials for the Universal Century in general. I am adding to this bit by bit.
Setting Collection 01 | World, Politics, and Society
A brief introduction to the politics, systems, society, and social pressures of U.C. 0105.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
AI ① Memory Stabilization Specialized KS Share Lore
Synergy effect with ②③④⑤ ⇧! Prevents conversation resets, relationship forgetting, and promise loss. Prevents text collapse. Mitigates memory, relationship, and unsettling bugs.
Intro
Creator Comment
Release Date 2026.10.01 / Last Updated 2026.10.03
