Phainon (, , ), real name Khaslana (), is a fictional character in the video game Honkai: Star Rail, developed by miHoYo. He serves as a pivotal figure in the game's Amphoreus story arc and is a member of the heroic group known as the Chrysos Heirs. Within the story, he is regarded as a savior tasked with recreating the world. Later in the narrative, it is revealed that Amphoreus has undergone thirty million repeated cycles, and that Phainon has continually borne the responsibility of preventing the birth of the Lord Ravager and Emanator of Destruction, Irontomb, repeatedly sacrificing himself in the process. Phainon first appeared in the main story in version 3.0 in January 2025, and became a playable character in version 3.4 in July.

Phainon's design is inspired by Kevin Kaslana from Honkai Impact 3rd. Phainon received positive critical reception for his tragic characterization, particularly his solitary endurance of thirty million cycles. His combat design was also described as one of the strongest in the game.

Design and voice acting Phainon first appeared in the main story as a non-player character in version 3.0 of the game in January 2025, and is one of the main characters in the Amphoreus story arc. On May 6, miHoYo released Phainon's character illustration and other basic information on their social media accounts, indicating that he would become a playable character and revealing his rarity, combat role and damage type. On June 17, the game's developers announced that the promotional livestream for version 3.4 would introduce Phainon's character details and upcoming story developments. During the livestream on June 23, further information was revealed about his combat style. Subsequently, on June 29, miHoYo released his character trailer "Coronal Radiance", using the solar corona as a metaphor to depict Phainon's solitary sacrifices across countless cycles of destruction. Phainon was officially released as a playable character on July 2 in version 3.4. On the same day, an animated short titled "Hark! There's Revelry Atop the Divine Mountain" was released, featuring the theme song "Flares of the Blazing Sun" performed by the singer YMIR. In addition, the Japanese women's magazine An An featured Phainon on the cover of a special-edition issue in June 2025. The issue included a long-form interview and Q&A, as well as a feature detailing his daily routine from waking to bedtime; official cover wallpapers were also released alongside it.

Adult Phainon is voiced in English by Joshua Waters, in Chinese by Qin Qiege, in Japanese by Satoshi Hino, and in Korean by . The character is voiced as a child in English by Justine Huxley, in Chinese by Mi Yang, in Japanese by Kotomi Aihara, and in Korean by Park Ha-jin. In an interview, Hino described Phainon as a young man who combines a sense of maturity with a gentle and accommodating nature. He said that Phainon seems dependable due to his role as a Chrysos Heir and savior, while also carrying a complex past shaped by the loss of his homeland. Hino specifically mentioned that shortly after meeting the protagonist Trailblazer, Phainon naturally assumes the role of a guide, introducing them to the city of Okhema. Hino argued that Phainon's willingness to help others without expecting anything in return is an important part of the character's appeal. He also said that beneath his composed demeanor lies a surprisingly competitive side. Scenes such as his contest with his friend Mydei over the number of enemies defeated or his endurance challenge in a high-temperature bathhouse reveal a contrasting facet beneath an otherwise mature exterior. When discussing his approach to performance, Hino stated that voicing Phainon was particularly demanding. Although the character is mature, gentle, calm and resolute, Hino's delivery needed to convey the weight of his past and the burden of his mission. Also, Phainon's manner of speech often carries subtle implications, appearing straightforward while carrying a hidden meaning, so Hino deliberately infused his tone with gentleness, caution and attentiveness, gradually intensifying Phainon's resolve and dramatic tension as the story progressed. He also mentioned that the wheat fields of Aedes Elysiae, Phainon's homeland, were a recurring image he envisioned during recording to enrich the character's emotional depth.

Appearances

Story Phainon is one of the central characters in the Amphoreus story arc of the game's main storyline. Amphoreus is a simulated world inspired by Ancient Greece, made of both Data and Memoria, which is enclosed within a computer system, where numerous characters establish city-states and belief systems. Its ultimate trajectory leads toward a destructive ending in which the Lord Ravager known as Irontomb is born. Originally created as an experimental entity, the electrical signal called NeiKos496, Phainon was born in the city of Aedes Elysiae and, a thousand years prior, joined a Titan-subjugation campaign known as the Flame-Chase Journey, led by Aglaea. He is a member of the heroic group known as the Chrysos Heirs. A prophecy foretells that he would become a savior tasked with recreating Amphoreus, as well as the final survivor who will reconstruct it on behalf of all. Recreating, in this case, refers to the process by which the Chrysos Heirs collect the necessary Coreflames to reconstruct Amphoreus; Phainon later learns that this simultaneously marks the completion of the Scepter of Irontomb.

After the Trailblazer and Dan Heng crash-land on Amphoreus, they encounter Phainon while he is rescuing refugees. They then follow him back to the sacred city of Okhema, thus becoming involved in the Flame-Chase Journey. After defeating Nikador, the Titan of Strife, Phainon's friend Mydei gives him the opportunity to inherit his Coreflame. However, Phainon becomes trapped within a trial while attempting to acquire the Coreflame due to his inability to overcome his inner fears, and is later rescued. Following Aglaea's death, Phainon succeeds her as the leader of the Flame-Chase Journey, and together with Hyacine, the Trailblazer and Dan Heng, defeats Aquila the Sky Titan.

When a prophecy that states "all shall bid farewell to one, and that person alone will witness the miracle" comes to pass, Phainon (having obtained the Coreflame of the World-Bearing Titan) arrives at the Vortex of Genesis, where he encounters the Flame-Reaver. He learns the truth of Amphoreus: the world is in fact in a simulated reality within the Scepter. The Scepter is a massive apparatus designed to simulate the development of civilizations and Amphoreus is the simulated world operating within it. Once the world's reconstruction is complete, an inorganic lifeform known as Irontomb, created for the purpose of destruction, will be born. Phainon and his companions are merely the "twelve factors", the core samples used by the Scepter to simulate the world's trajectory. The current Flame-Chase Journey is already the 33,550,336th recursive loop of the cycle involving Phainon's generation. Before this loop known as the "Eternal Recurrence" began, the original lifetimes of Phainon, born Khaslana, and Cyrene, after uncovering deception by a being known as Lygus, forged a closed time loop to prevent Irontomb's birth, more precisely by provoking a recursive feedback loop of their specific cycle. They agreed that Khaslana would kill Cyrene in order to draw the attention of Fuli, the Aeon of Remembrance, thereby ensuring the cycle would repeat indefinitely. In each subsequent cycle, Phainon is forced to kill Cyrene, while gathering as many Coreflames as possible and storing them within himself to prevent the world's destruction, all while waiting for an external force to enter Amphoreus. He would also confront his own new cyclical lifetimes, ending up with the Phainon who dies coming back to life as his surviving self, who would in turn recover the entirety of his memories and powers, thanks to this process of self-iteration. Eventually, Khaslana's longest lasting body collapses under the immense burden, and he chooses to reveal the truth to his subsequent lifetimes, each of whom makes the same choice after recovering the entirety of their memories. In the 33,550,336th cycle, Phainon was meant to trigger a new recursive loop as the Flame-Reaver after killing him and recovering his memories, and reach for his future self to continue the cycle; however, the Trailblazer's arrival in Amphoreus becomes the variable that disrupts this predetermined course of fate. Phainon therefore sends them back to the beginning of the cycle after triggering the loop, to search for a way to defeat Irontomb. Afterward, Phainon unleashes the power accumulated across countless cycles to confront Nanook, the Aeon of Destruction, and his followers. He loses the fight and is absorbed by Irontomb, but in the course of battle, he earns Nanook's gaze. As a result of throwing himself out of the cycle, a new lifetime of his is not born in the following loop, and he slows down the Black Tide's progress from the outside instead.

In the conclusion of the Amphoreus story arc in version 3.7, Irontomb is destroyed, the Scepter is shattered, and Amphoreus is reduced to stardust. The memories of Phainon and the other Chrysos Heirs are preserved in their entirety in the book "As I've Written". Herta confirms that Amphoreus and the Chrysos Heirs are currently being reborn as real entities in the universe based on the book, emerging from the Memory Zone, but that when exactly this process will finish remains uncertain.

Gameplay

Phainon is a five-star Physical character following the Path of Destruction, serving as a main DPS in gameplay. In combat, he can accumulate a resource called "Coreflame" through various means, mainly by damaging enemies or receiving buffs from allies; upon reaching a certain threshold he can activate his ultimate to enter a transformed state and deploy a special combat domain. While transformed, his teammates temporarily leave the battlefield and all enemies become more susceptible to Physical damage. Phainon switches to an alternate moveset and gains immunity to crowd control effects and cannot be killed. While in the transformed state, he gains and consumes "Scourge" to unleash high-damage skills such as "Foundation: Stardeath Verdict". Additionally, when Phainon is in the party, the maximum number of Technique Points available during exploration is increased. His Technique can instantly eliminate normal enemies within a given range on the map without triggering combat.

Promotion

In July 2025, Good Smile Company unveiled a nendoroid figure of Phainon which came with three accessories: wings, a sword and a mobile phone. It is scheduled to be released in China in May 2026 and in other territories at a later date. That September, he and fellow Chrysos Heir Castorice were used as part of a collaboration between the game and the Chinese chain coffee brand Luckin Coffee. In November of the same year, the music video for Japanese voice actor Mamoru Miyano's song "Zero Light" was released, with Phainon and the other Chrysos Heirs as the theme. In the visual feed, Phainon can be seen facing a threat, while Tribbie and the other Chrysos Heirs stand behind him in support.

Reception