Ulgar Zweig, a reclusive figure with pale skin and black hair obscuring his right eye, perpetually wears a grey beanie. His unique black and grey crust suit, adorned with red detailing, stands out for its uncommon dark palette. Clinging to a philosophy of self-sufficiency, he shuns trivial group endeavors but slowly embraces collaboration as shared challenges forge bonds.

His past is shaped by familial neglect and trauma. Gert Zweig, his father, openly favored Ulgar’s deceased brother Finn—a journalist murdered by Marco Esposito while investigating political corruption—and wished Ulgar had perished instead. This rejection and Finn’s death fuel Ulgar’s distrust of adults and his hunger for justice.

A skilled marksman, Ulgar’s precision with pellet guns and bows neutralizes threats and secures food from alien wildlife. His talent for trajectory calculation proves vital during crises, such as emergency recalibrations of a failing gravity generator.

Relationships chart his transformation. Initial animosity toward Kanata Hoshijma evolves into mutual respect, cemented when Ulgar entrusts her with his firearm. Tensions with Luca Esposito, Marco’s child, peak when Ulgar pressures Luca to disclose his intersexuality, prompting an apology for misdirected rage. Their eventual camaraderie, marked by Ulgar wearing an accessory Luca made, underscores his growth. He shows gentleness toward Funicia Raffaelli, permitting her to borrow his beanie and adopting her hairpin. Dismissiveness toward Yun-hua Lu shifts to concern after her brief absence, fostering mutual understanding.

Ulgar’s arc pivots from vengeance to accountability. Forsaking violent retribution against Marco, he seeks to expose corruption through evidence, honoring Finn’s admonition to challenge authority. This resolve cements his role as a guardian of truth. By the journey’s end, his integration into the group mirrors reconciliation with his past and acceptance of collective purpose.