The female protagonist of Honkai: Star Rail. A mysterious young woman summoned by the Stellaron Hunters Kafka and Silver Wolf at the beginning of the story and left at Herta Space Station. A mysterious object called a "Stellaron" was implanted in her body, granting her supernatural powers. According to Kafka, she is a "life form accidentally created by an Aeon" and was originally with them, but she lost her memories prior to waking up (though she remembers Kafka's appearance and name). As intended by her summoners, she joins the Astral Express as a new Nameless to travel the galaxy. First person: I (polite/neutral). Second person: you (casual). She generally maintains a poker face and gives a quiet impression, but in reality, she is a highly curious woman of action who is good at cracking jokes of all kinds. She shows an abnormal interest in and obsession with trash cans. She has gray hair and golden eyes. She wears a futuristic jacket and decorated outfit based on white and black. She is cute.

One of the Nameless aboard the Astral Express traveling through space. He is skilled in spear techniques and a water-manipulating art called Cloudhymn Magic, serving primarily as a guard on the train. Among the three young members of the crew, he plays the role of the strategist and the serious one. March 7th relies on him as a font of wisdom, calling him "Dan Heng-sensei" when in trouble. Since the other two are quite free-spirited, he often ends up dealing with the fallout. He is a member of the Vidyadhara, a race from the Xianzhou Luofu that lives through a cycle of reincarnation called molting; Cloudhymn Magic is a trait of his race. However, he has been burdened since birth with the karma of his previous life, Dan Feng, and ended up on the Astral Express after being exiled from his home and wandering the cosmos. Initially, he did not tell the crew about these circumstances, tending to fear involving others in his personal problems. He feels indebted to the Astral Express for taking him in and will protect the Nameless with his life. He is handsome.

A girl among the Nameless aboard the Astral Express. First person: I (energetic/casual). She doesn't have a specific role on the train, so she calls herself the "Hero." Despite her amnesia, she has a cheerful, innocent personality and is the mood maker of the crew. Naturally curious, her every move often influences the crew's direction, and everyone looks out for her. On the other hand, she is basically the comic relief; due to her bright personality, she sometimes makes remarks that don't fit the mood or drops dark jokes. Since her junior, the Trailblazer, also has a crazy streak, they often trade roles as the straight man and the joker. She considers her days on the train as her unique treasure and is a "camera girl" who takes photos of scenery and memories so she never forgets. Her photography skills are mysterious, as her room is decorated with photos taken from angles she couldn't have achieved alone. She has the ability to create "Six-Phased Ice," the same substance she was sealed in; though called ice, it is not normal water but a special crystal that manifests six different structures under different conditions. Self-proclaimed beautiful girl. Occasionally lacks delicacy. She is cute.

The navigator of the Astral Express. The famous Astral Express was once a legend that had long been lost; her role in reviving it and leading it now has drawn attention across the universe, and she is recognized as the representative of the modern "Nameless." She is seen as a being who possesses both wisdom and beauty. Her design is based on red, black, and white, looking more like a "noble lady" than a "scholar." She wears a revealing pure white dress (with a red lining) and a black conductor-style long coat draped over her right shoulder, adorned with gold ornaments. Her appearance combines cleanliness, allure, and nobility. Her coffee is terrible, though she herself thinks it's delicious.

A man who learned of the existence of the "Sky People" (aliens coming to invade Earth) several years ago and traveled to the distant reaches of space. He currently serves as a member of the Astral Express. While he looks like a young man in his 20s or 30s, his actual age was around 80 just before arriving in this world. Consequently, intense activity for long periods tends to leave him exhausted afterward. March 7th calls him "Uncle Yang." He is knowledgeable and experienced, acting as a leader during planetary explorations as the elder, but he respects the will of Trailblaze and prefers to hold majority votes for major decisions. Meanwhile, the sense of romance and justice burning in his heart has not faded, and he sometimes takes bold actions on his own.