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Spoiler warning: This page describes major plot beats from 🟩 RSR - Bloodtiger (rev2.5 era backstory), including the collapse of RD10-003 and the lead-in to Battle at Birch.
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Canon anchor (rev2.5): The RD10-003 Incident is the moment the Sun Jin living-weapon program loses control of its most dangerous asset—and the story permanently pivots from “black-site custody” into the escape chain that culminates in Battle at Birch.
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RD10-003 is designed to be a closed system: sedate the subject, run trials, record results, reset the loop. The incident is the first time that system fails in a way it cannot quietly recover from. Rio Narro enters the facility with enough legitimacy to see what the program is actually doing, and what she sees forces a decision. She doesn’t attempt reform, escalation, or reporting. She severs the program at the root by killing Professor Denim and collapsing the project’s authority in a single move.
Once Denim is gone, RD10-003 stops behaving like a laboratory and starts behaving like an emergency. Alarms and response protocols may still exist, but the logic holding them together—who can issue orders, who controls the custody chain, who understands the real state of the project—begins to fracture. In that chaos, Forza Ninetails is no longer a contained experiment. He becomes an uncontrolled variable moving through a facility built around the assumption that he would never meaningfully “move” without permission.
Rio’s entry is framed as procedural: the kind of access that comes with credentials, mandates, and the authority to look into internal materials without immediately triggering a lockdown. The critical step isn’t her arrival—it’s her exposure. She reviews the program’s outputs and internal documentation and sees the living-weapon trials for what they are: coercion dressed as research, forced performance dressed as data, and violence treated as an engineering variable.
That moment is the moral hinge of the event. Rio’s response is not subtle. She kills Denim (and the researchers present with him), effectively decapitating the program’s command layer. Whatever the facility’s automated defenses can do afterward, the system that makes RD10-003 “work” is suddenly missing its head.
From there, the incident becomes a containment collapse. With the project destabilized, Forza begins to re-emerge under conditions that are no longer tightly governed by sedation schedules and controlled test windows. The facility’s attempt to reacquire him becomes reactive: pursuit, lockdown, and emergency coordination rather than planned “trial runs.”
Rio’s final intervention is the operational twist that makes this incident distinct from a simple breach. She does not merely release Forza and run. She briefly incapacitates him—long enough to remove him from the immediate search grid and break the Sun Jin’s shortest reacquisition path. In the rev2.5 scaffold, this is the ravine/terrain separation beat: a deliberate act of violence used as concealment, not betrayal. It buys time, creates distance, and forces the recovery apparatus to search the wrong problem first.
Once that separation is achieved, Rio pivots to movement and concealment. The incident stops being “inside RD10-003” and becomes “outside RD10-003”: a flight toward rural edges, toward anonymity, and toward Birch.
The RD10-003 Incident is a plot hinge with four lasting consequences.
First, it ends the fantasy that RD10-003 is a stable research program. By removing Denim, Rio proves the project’s stability is not technological—it is political and personal, held together by a small number of people and their control of information.
Second, it reframes Rio. Up to this point she can plausibly be read as an operator “inside” Sun Jin machinery. Here she becomes an actor willing to destroy that machinery rather than serve it. The choice is irreversible; the bridge burns behind her.
Third, it changes Forza’s narrative state. He stops being defined primarily by captivity and conditioning and becomes defined by pursuit. The setting starts treating him as something that cannot be stored safely: an asset that has become an existential liability.
Fourth, it plants the chain of fallout that makes Birch inevitable. Once a black-site loses a living weapon, the empire’s response can’t remain local. Recovery forces spread outward, and every “quiet” hiding place becomes temporary.
RD10-003 is also where the setting’s myth-charged materials become operational. The program’s attempts to weaponize Forza intersect with relic-grade loadouts, including the Gotanenks Armor and the broader question of how the empire studies and repurposes sacred Templar technologies. Likewise, the incident sits adjacent to the empire’s interest in blade-materials such as Varunium Steel, which functions in the lore as “Varuna’s power made stable and portable.”
Even if RD10-003 cannot mass-produce myth, it can still exploit it—by putting it on a controlled subject and treating field violence as a test environment. The incident is the moment that exploitation stops being contained to an underground facility and starts leaking into the world.