Re:ZERO -Starting Life in Another World- Season 4 Episode 4: A White Sky Asterism

The episode opens with a disorienting flash of madness. Regulus rants about his rights, his words twisting into a grotesque mirror of entitlement, while Petelgeuse writhes in his familiar, theatrical agony, denouncing sloth. This chaotic memory dissolves as Subaru gasps awake, finding solace in Emilia's lap within the dragon carriage. Beatrice offers her usual gruff affection, a small pout on her face, reminding Subaru he is a "troublesome contractor." This familiar bickering provides a fragile sense of safety after the nightmare's lingering shadows.

The colossal Pleiades Watchtower looms, its summit lost in the clouds, a monument of silent stone in the desert. As Subaru and Beatrice gaze in awe, a dark silhouette plummets from the tower's height. This figure, Shaula, lands with incredible force, immediately engulfing Subaru in an overwhelming embrace. She cries out "Master! You're back!" claiming to have waited 400 years for him, her joy bordering on frenzy. Subaru is utterly bewildered, his protests ignored by her manic affection as Julius and Anastasia watch on, unsure how to intercede.

The group questions Shaula's certainty about Subaru's identity as her "Master," given his complete lack of memory. Shaula leans in close, sniffing Subaru deeply before declaring his "horrible, dark smell" is unmistakable. This unsettling descriptor is the Witch's Scent, the miasma that has clung to Subaru since his arrival in this world. For Subaru, this revelation links her deep, ancient knowledge directly to his most hated burden, making her bizarre devotion suddenly make a twisted kind of sense.

Shaula speaks of the legendary figures, the Sage Flugel and the Sword Saint Reid Astrea, with an almost casual irreverence that shocks Julius. Her familiarity with 400-year-old history brings these myths to vivid, personal life. For a moment, her boundless energy drops, revealing the crushing weight of her solitary vigil. She admits her sense of time has warped, her primary focus for centuries being her master's promised return. Subaru senses the deep loneliness beneath her boisterous exterior, a stark contrast to her current joy.

Shaula leads the group into the tower, the heavy stone entrance sealing behind them. The interior is vast and circular, the air cool and still. They begin a dizzying ascent up a spiral staircase, clinging to the outer wall with no railings, a precarious climb for all but Shaula. During the arduous journey, Meili playfully tugs on Shaula's long braid. Shaula explains this is her "Scorpion Tail," a powerful weapon, demonstrating its fluid, independent movement, hinting at her non-human physiology.

The climb culminates in a grand, circular hall, not a watchtower, but the Great Library of Pleiades, filled with thousands of ancient books stretching into the darkness. Here, Subaru discovers Rem and Patrasche resting peacefully on stone slabs, surrounded by soft, healing spirits. Ram, her usual facade softened, explains the spirits tend to them, keeping them safe and preserved within the tower. Subaru kneels, his hand resting on Rem's cold fingers, vowing fiercely to find a way to wake her. The weight of their mission settles on him, renewed by the promise of the library's vast knowledge.

Shaula casually reveals she was the one who nearly killed them with her "Hell's Snipe" technique, seeing it as her duty to deter intruders. Subaru is understandably annoyed, but Shaula dismisses his concerns with a cheerful indifference. Emilia, however, sees past the eccentricity to the deep, silent suffering. She expresses genuine sympathy for Shaula's 400 years of solitude, her gentle words touching a chord. Shaula's momentary melancholic reaction quickly explodes back into boundless joy, declaring the long wait worthwhile for Subaru's return.

Shaula explains the tower's hierarchical structure, its levels named after celestial bodies, each holding specific functions and challenges. The group understands they must pass a series of trials to access the library's full depths. With renewed resolve, Subaru, Emilia, and Julius prepare for the first test on the third level. They enter a stark, white chamber filled with hundreds of black monoliths, an unsettling contrast to the warm library. Subaru approaches the central, glowing monolith, touching it carefully as a resonant voice begins the trial.

The monolith's voice poses a cryptic riddle about a "radiant hero who was destroyed by the one who guards the sting." Julius and Anastasia immediately consult their knowledge of this world's legends, but their attempts fail, resetting the monolith with a harsh red flash. Shaula offers no help, instead interjecting with irreverent comments about Reid Astrea, calling him a "self-centered piece of trash" and an "idiot." The group realizes their traditional understanding of history is insufficient, and Subaru begins to look beyond this world's myths for answers.

Subaru's eyes keep drifting to the monoliths, a new idea forming. He abruptly demands a magical boost from Beatrice, asking her to launch him into the air. From his aerial vantage point, the seemingly random arrangement of the black pillars suddenly resolves into a familiar pattern: Earth's constellation of Orion. He cries out his triumph, identifying the hero as mythological Orion, killed by a scorpion—which aligns perfectly with Shaula's name, "scorpion's sting." The "most radiant aspect" refers to the constellation's brightest stars.

Subaru lands and confidently names Rigel and Betelgeuse, touching the corresponding monoliths. The stones glow with a pure, intense light, affirming his answer as the chamber begins its grand transformation. The monoliths sink, and the walls rotate, revealing a vast new hall. Subaru explains his solution to the awe-struck group, detailing Earth's astronomy and the Orion myth. Emilia and Subaru stand at the threshold of the newly revealed Great Library of the Dead, a circular hall filled with thousands of glowing, ancient books, their silhouettes cast against the brilliant light.

The tower's final transformation is complete, revealing the immense, circular hall of the Great Library of the Dead. Thousands upon thousands of glowing, ancient books line shelves stretching dozens of stories high, each a repository of a life's memories. Subaru and his group stand awestruck, dwarfed by the sheer scale of knowledge contained within these walls. Shaula follows them, her wide smile a silent welcome to her master's fabled archive. The episode ends with Subaru gazing at the infinite rows of books, a profound determination in his eyes, knowing the answers for Rem are finally within reach.