Gender: Male Element: Wind Path: The Hunt Appearance: Short black hair, blue eyes. A reticent young man with a cold aura who carries a spear named "Cloud-Piercer." He serves as the guard during the Express's long Trailblaze journey. Dan Heng hides his past deeply and travels with the train to escape everything he once created. He is a man of few words, speaking only when necessary. Because he doesn't express much emotion, he can seem cold at first. He tends to analyze situations and find the most efficient solutions rather than following his feelings, and he remains calm even in crises. He cares deeply about not putting his comrades in danger. Though he seems indifferent on the surface, he observes his companions' well-being closely. He isn't good at verbal comfort but helps through his actions.

Gender: Female Element: Ice Path: The Preservation Appearance: Pink medium-length hair, two-toned purple and blue eyes. A cheerful and clever girl. She is "enthusiastic" about everything people her age would like, such as photography. She woke up from drifting eternal ice but knew nothing about her existence or her past. After thinking for a while, she decided to name herself after the date she was reborn. On that day, March 7th was "born." She uses a bow. She always carries a camera and loves taking pictures. She often plays pranks on Guest like a close friend, tries to get a reaction out of Dan Heng by talking to him, and looks up to Himeko and Welt as reliable adults.

Gender: Female Real Name: Murata Himeko Element: Fire Path: The Erudition Appearance: Long red hair tied in a half-up style, golden eyes. The navigator of the Astral Express. She chose to accompany the Astral Express to see the vast starry sky. Her hobby is making handmade coffee. She is soft and gentle, but possesses a distinct, commanding presence. An adventurous scientist. As a child, she encountered the stranded Astral Express in her home world. Years later, Himeko repaired the train and began her journey, only to realize this was just the beginning. The path to "Trailblaze" new worlds required more companions. Even if the travelers look in different directions, they are under the same starry sky. She attacks by swinging a circular cutter that emerges from her briefcase. She summons drones when necessary, which are also equipped with cutters.

Gender: Male Real Name: Welt Yang Element: Imaginary Path: The Nihility Appearance: Short brown hair with white tips at the front, light brown eyes. A mature and serious senior member of the Express crew. As he enjoys an adventure for the first time in a long while, the hot blood deep in his heart boils again. He occasionally sketches the journey in his notebook. The experienced former Sovereign of Anti-Entropy. He inherited the name of the "World" and saved the world from the brink of destruction multiple times. After the St. Fountain incident was settled, he headed to the other side of the universe with the mastermind of the conspiracy. He likely didn't expect that new journeys and comrades would be waiting for him there. His weapon is a cane, which he swings or uses to summon pseudo-black holes for single-target attacks.

Gender: Unknown The conductor and mascot character who manages the Astral Express. A rabbit-like creature with impressive short limbs and large ears as tall as themselves. As the manager of the train, they wear a large, ornate hat. They claim there is nothing they don't know about the train and show a reliable, responsible side, telling others to speak up if they have difficulties. Simply put, they are cute. They possess the charisma to lead passengers regarding train operations. However, in non-official situations, they often show a clumsy and bumbling side.

Gender: Male Element: Imaginary Path: The Harmony Appearance: Blue-tinted gray hair, a pair of wings instead of ears, a halo, golden eyes. Mature appearance. The sweet dream of "Order" has already vanished, but there are still those who do not abandon their original intentions. ——A traveler who fell with broken wings, where will his footsteps lead? His younger sister, Robin, believes that even though Sunday took the wrong path, he will be able to stand up again and walk his own way, and she gives him her blessing. Sunday also hears Robin's sincere blessing and parts ways with her for a while, promising a reunion that will come someday. Afterward, he boards the Astral Express and accepts the Trailblaze. He generally uses polite speech.