Who is Lygus in Honkai Star Rail?

Lygus, also known as Lycurgus, is an NPC character in Honkai Star Rail, introduced during the Amphoreus storyline. He is known by the title "Theoros" within the Council of Elders, which is a governing body that oversees decisions and maintains order in Amphoreus.

With the release of the latest Trailblaze Mission, “For the Sun is Set to Die,” Lygus takes on a more central role that is interconnected with the origins of Amphoreus. Here's more on the character.

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Lygus’s control over Amphoreus explained in Honkai Star Rail

Lygus is an Intellitron from the Antikytheran model line and is not native to Amphoreus. His name is inspired by Lycurgus, the legendary Spartan lawmaker known for establishing Sparta’s rigid military and societal systems.

In Honkai Star Rail, Amphoreus is a simulated world constructed by an Emperor’s Scepter (Rubert II). It was later used as a neuron to solve a philosophical equation posed by Nous, the Aeon of Erudition.

Lygus in the Trailblaze Mission "For the Sun is Set to Die" (Image via HoYoverse)

Originally constructed for knowledge and understanding, it was abandoned by Nous for unknown reasons. Lygus eventually took control of Amphoreus’ systems to continue working on the equation. Although he earned the gaze of Nous, the Aeon of Erudition, his true goal was tied to Destruction.

He believes that destruction is the inevitable answer to the original equation: "What is the prime mover of life?" This belief introduces an existential contradiction in general philosophy, one that perfectly reflects the core themes explored throughout Honkai Star Rail.

Lygus as Theoros during the cutscene of escorting Anaxa and Cerces to Dawncloud (Image via HoYoverse)

Lygus holds a respected position in Okhema, the last standing city of Amphoreus. As Theoros, he served on the Council of Elders, acting as a voice for the people of Amphoreus and communicating directly with Kephale, the Worldbearing Titan.

Outwardly, he has defended freedom of speech and civil rights, even standing up to figures like Caenis. Yet, beneath his public role, Lygus’s true identity as Amphoreus’s administrator and silent observer hints at a deeper, hidden agenda.

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Lygus’s plan for Amphoreus: From Erudition to Destruction

In the recent Trailblaze Mission “For the Sun is Set to Die,” Lygus is revealed as a central figure responsible for changing Amphoreus’s original purpose. He’s shifting it from a world built on the concept of Erudition to one shaped by Destruction. His long-term experiment involved testing a destructive formula, later known as the Destruction Equation.

Lygus remarks on the process of extrapolations done in Amphoreus (Image via HoYoverse)

To perfect the equation, Lygus tested it on countless worlds other than Amphoreus, leading to the collapse of several advanced civilizations. These incidents were mistaken by the IPC as attacks from a Lord Ravager. In truth, this was all a part of Lygus's test to create Irontomb, a Ravager born within the simulation.

He also hints that he may be working under a higher power. He had offered Dan Heng a way to escape Amphoreus without catching the watchful eye of Aquila, the Sky Titan. However, this would only be possible if Dan Heng and the Trailblazer agree to abandon the Flame Chase journey.

Lygus warns Herta about the consequences of her further intrusion into Amphoreus (Image via HoYoverse)

Even when confronted by Herta in the firewall of Amphoreus, Lygus warns her of the consequences of intruding further, suggesting that doing so could release destruction across the cosmos. This was hinting at the release of Irontomb, one of the Lord Ravagers in Honkai Star Rail.

Despite his central role in shaping Amphoreus and triggering the birth of Irontomb, Lygus often refers to himself as merely an "observer." In true Honkai Star Rail fashion, he is a character caught between logic and ruin.

Whether as an administrator, observer, or calculated manipulator, he plays a critical role in shaping the fate of Amphoreus and possibly the universe beyond. As the story of Amphoreus continues, Lygus’s choices and their consequences can potentially affect the entire universe of Honkai Star Rail.