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Longinus is a planetary defense orbital weapon system formerly stationed in orbit around Amber Krowe. It is most notable for the rooftop incident — the Encounter at Tisiphone Tower — where it begins to spool to fire before being destroyed by Tanuki. This moment is depicted in the current drafts BT - Chapter 8 (as a flashback) and its cropped retelling Illumination VIII - Tisiphone.

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Tech note: lasers / beam weapons in-setting

In this setting, true laser/beam weaponry is highly rare—not because it’s unknown, but because the engineering and manufacturing constraints are extreme at useful scales.

• Longinus is exceptional: it’s a gigantic orbital laser system that effectively had to be built in space, and had to be that large just to exist as a working weapons platform.
• By contrast, the Sun Jin capital ship Esther is portrayed as carrying miniaturized beam weapons, marking it as a technological outlier compared to most fleets and planetary defenses.

What it is (reader-facing)

Longinus is presented as the kind of strategic asset a great power keeps in orbit to make invasion—and rebellion—untenable. While framed as planetary defense, the system’s firing profile is shown to be capable of area saturation against targets on the surface, turning it into a tool of coercion and execution when aimed downward.

Observable activation signature

When Longinus is spooling to fire, the scene describes a distinct set of cues that can be treated as “on-page diagnostics” for the reader:

• Blue particle points appear across the sky/area and begin to rise.
• The points intensify into upward beam-lines / streaks as the sequence ramps.
• The ramp culminates in a blinding flash and a high harmonic tone as the strike nears completion.

Additional details from the Encounter at Tisiphone Tower

• Escalation context: Longinus activates while Tanuki and Kaisara are on the tower’s rooftop helipad, with Systems Alliance forces attempting to secure the area below.
• Civilian-facing optics: Residents in Madora Bay report a visible beam projected toward the city center during the incident.
• Official Systems Alliance narrative (in-scene broadcast):
  • The platform suffered a “catastrophic systems failure” after a “sophisticated cyber intrusion” compromised guidance/attitude-control systems.
  • The visible beam is framed as emergency range-finding / altitude determination, not a firing sequence.

Notable event: Amber Krowe rooftop incident

The Encounter at Tisiphone Tower is where Longinus becomes the ticking clock over a ground-level confrontation. This is depicted in the current drafts — BT - Chapter 8 (flashback) and the cropped retelling in Illumination VIII - Tisiphone — with rev2.5 preserved as an alternate variant:

• Systems Alliance forces locate and corner Tanuki and Kaisara on a high-rise rooftop.
• Longinus begins its visible activation sequence overhead.