Table of Contents

Starfox (Eros of Titan)

Part 1: The Dossier: An At-a-Glance Summary

Part 2: Origin and Evolution

Publication History and Creation

Starfox, originally known simply as Eros, made his debut in the midst of the Bronze Age of Comic Books, a period marked by darker, more complex characterizations and sprawling cosmic narratives. He first appeared in The Invincible Iron Man #55 in February 1973, in a story that served as a prologue to the seminal “Thanos War” saga. He was co-created by writer Mike Friedrich and artist/writer Jim Starlin, the latter being the principal architect of Marvel's cosmic landscape and the creator of Eros's infamous brother, Thanos. Starlin conceived of Eros and Thanos as a cosmic Cain and Abel, embodying the dualistic principles of Freudian psychology: Eros representing the life instinct (love, creativity, sexuality) and Thanatos representing the death drive (aggression, destruction). This philosophical underpinning gave their sibling rivalry a mythological weight that has resonated for decades. Initially, Eros was a secondary character, a carefree adventurer providing a stark contrast to his brooding, megalomaniacal brother. It wasn't until he joined the Avengers in The Avengers #232 (1983) that he adopted the codename “Starfox” at the suggestion of the Wasp, and his character began to receive more significant development, moving beyond being simply “Thanos's brother.” His tenure with Earth's Mightiest Heroes solidified his place in the Marvel Universe, but it was his later appearances, particularly in the 2005 She-Hulk series by Dan Slott, that would critically re-examine and deconstruct the character in a way his creators likely never anticipated.

In-Universe Origin Story

The origin of Starfox is a tale of two brothers defined by their opposition, set against the backdrop of a utopian society's tragic fall. However, the details of this origin differ significantly between the prime comic continuity and the cinematic universe.

Earth-616 (Prime Comic Universe)

Eros is a member of the Eternals, a race of super-powered humanoids created by the cosmic gods known as the celestials. His story, however, begins not on Earth, but on Saturn's moon, Titan. Following a schism among Earth's Eternals, two factions went their separate ways. One group, led by Uranos, was exiled and eventually settled on the planet Uranus, while the other, led by Kronos, remained on Earth. Kronos's son, A'lars (also known as Mentor), rejected his father's passive leadership and journeyed into space to found his own society. He discovered the ruins of the Uranian Eternal colony on Titan and, with the sole survivor Sui-San, rebuilt it into a technological and philosophical paradise. A'lars and Sui-San became the parents of Titan's new generation of Eternals, and their first two sons were Thanos and Eros. From birth, the brothers were polar opposites. Thanos was born with the Deviant Syndrome, a genetic mutation that gave him a monstrous, purple-hided appearance, marking him as an outcast in the physically perfect society of Titan. This rejection fueled a deep-seated nihilism and a morbid fascination with Death. Eros, by contrast, was born handsome, charismatic, and possessed of a boundless joie de vivre. He was beloved by all, spending his youth pursuing pleasure, art, and romance across the moon and the wider galaxy. This carefree existence was shattered when Thanos, now fully in thrall to the cosmic entity Mistress Death, initiated a genocidal attack on their homeworld, killing their mother Sui-San in the process. This horrific act forced Eros to confront the true evil of his brother for the first time. Taking his brother's threat seriously, Eros fought alongside the survivors and the Kree warrior Captain Mar-Vell to thwart Thanos's first attempt to seize the Cosmic Cube. This was Eros's crucible, transforming the hedonistic adventurer into a reluctant hero. After Thanos's initial defeat, Eros journeyed to Earth, seeking allies and a new purpose, which eventually led him to join the ranks of the Avengers, where he hoped to proactively protect the universe from threats like his brother.

Marvel Cinematic Universe (MCU)

The MCU drastically re-envisions the origin of the Eternals, and by extension, Starfox. As revealed in the film Eternals (2021), the Eternals are not a natural offshoot of humanity but are synthetic beings created by the Celestial Arishem the Judge in the World Forge. They are programmed with false memories of a homeworld called Olympia and are sent to countless planets to cultivate sentient life, allowing it to grow until the population is large enough to trigger the “Emergence” of a new Celestial, which destroys the host planet in the process. Starfox, who introduces himself as Eros, makes a surprise appearance in the film's mid-credits scene. Portrayed by Harry Styles, he teleports aboard the Eternals' ship, the Domo, alongside a CGI companion named Pip the Troll. He confronts the remaining Eternals—Thena, Makkari, and Druig—and reveals two shocking facts: first, that he is an Eternal, and second, that he is the brother of Thanos. This origin presents a fundamental divergence from the comics. In this continuity, both Eros and Thanos are artificial beings created by a Celestial. This implies that Thanos's actions may not have been born of pure nihilism but were perhaps a rebellion against his programmed purpose, knowing what the Emergence meant for life in the universe. Eros's introduction positions him as a figure who has broken free from Arishem's control, as he offers to help the Earth-based Eternals find their captured comrades. He possesses an Eternal Communication Sphere, similar to the one used by Ajak and Sersi, signifying his high rank or special knowledge. His personality appears to be in line with his comic counterpart—charming, confident, and a little roguish—but his backstory as a synthetic being on a cosmic mission completely reframes his motivations and his millennia-long conflict with Thanos. The MCU has yet to explore their shared history on Titan or the specifics of their sibling relationship within this new framework.

Part 3: Abilities, Equipment & Personality

Starfox's character is defined by a unique combination of a charming, almost frivolous personality and a set of powers that carry immense and troubling ethical weight.

Earth-616 (Prime Comic Universe)

Personality

Eros is the living embodiment of his name: a creature of passion, romance, and hedonism. His worldview is fundamentally optimistic and life-affirming. He believes life is a gift to be enjoyed to its fullest, a philosophy that places him in direct opposition to Thanos's worship of death. He is typically seen as charming, witty, and flirtatious to a fault. During his time with the Avengers, he often served as the team's comic relief, his laid-back “party-boy” attitude a stark contrast to the stoic seriousness of members like Captain America. However, this carefree exterior masks a deeper capacity for heroism and a profound sense of responsibility, particularly concerning his brother. When the universe is threatened, Eros has consistently proven himself a brave and loyal warrior. The greatest challenge to his personality came during his trial, where the accusations against him forced him to confront the dark potential of his powers. This event left a lasting scar, making him more introspective and cautious about his abilities and how others perceive him.

Physiology and Powers

As an Eternal of Titan, Eros possesses a range of superhuman abilities derived from his race's cosmic energy manipulation.

Marvel Cinematic Universe (MCU)

Our understanding of the MCU Starfox's abilities is limited to his brief appearance and the established powers of other Eternals in the film.

Personality

From his short introduction, Eros displays a charismatic, confident, and slightly arrogant demeanor. His grand entrance with Pip the Troll suggests a flair for the dramatic and a self-assuredness befitting a “prince of Titan.” He seems friendly and willing to help, but his true motivations and the depth of his character remain unexplored.

Abilities

Part 4: Key Relationships & Network

Core Allies

Arch-Enemies

Affiliations

Part 5: Iconic Events & Storylines

The First Thanos War (Captain Marvel #25-33, 1973-1974)

This is the storyline that introduced Eros to the Marvel Universe. When Thanos obtains the Cosmic Cube, a device of limitless power, he ascends to godhood and threatens all of reality. Eros travels to Earth to warn the Avengers and teams up with Captain Mar-Vell to lead the charge against his brother. In this arc, Eros is portrayed as a passionate but somewhat naive adventurer, horrified by the scale of his brother's ambition. His inside knowledge of Thanos's psychology proves invaluable, and he plays a key role in the final confrontation that sees Thanos seemingly destroyed by Mar-Vell, who shatters the Cube. This event established Eros as a cosmic hero and set the stage for their lifelong conflict.

The Infinity Gauntlet (The Infinity Gauntlet #1-6, 1991)

Arguably the most famous Marvel cosmic event, Starfox played a small but significant role. After Thanos acquires all six Infinity Gems and wipes out half of all life in the universe, Eros is among the heroes who answer Adam Warlock's call to arms. During the initial assault on Thanos's cosmic fortress, Eros and his fellow Eternals are swiftly defeated. Thanos takes particular pleasure in capturing his brother, subjecting him to a torturous fate by sealing his mouth with cosmic energy to silence his pleas. He is held captive alongside Nebula until the climax of the battle, serving as a living symbol of Thanos's cruelty and his ultimate victory over life itself. His survival and subsequent role in the aftermath solidified his status as a key player in the cosmic hierarchy.

The Trial of Starfox (She-Hulk Vol. 2 #6-7, 2005)

This two-part story is the most critical event in Starfox's modern history. He is accused of sexual assault by a married woman, who claims he used his powers to seduce her. The case gains notoriety, and She-Hulk, a fellow Avenger, is appointed as his defense lawyer. The story masterfully explores the moral minefield of his powers. Is a “yes” truly a “yes” if it's induced by psionic euphoria? Did he influence every romantic partner he ever had? The trial forces Eros to question his entire life and identity. He flees to Titan with She-Hulk, where it is revealed by the Titanian computer ISAAC that Eros's powers are far more potent than he knew, and he has likely been subconsciously influencing everyone around him for years, including his teammates on the Avengers. The revelation that a Celestial was responsible for amplifying this power paints him as a victim in one sense, but it doesn't erase the violation experienced by others. The story ends with She-Hulk, disgusted by the implications, knocking him out, and Starfox voluntarily choosing to have his powers psionically dampened to prevent him from ever harming anyone again, marking a profound and tragic turning point for the character.

Part 6: Variants and Alternative Versions

See Also

Notes and Trivia

1) 2) 3) 4) 5)

1)
Eros's name is taken directly from the Greek god of love and desire, forming a perfect mythological and psychological parallel to his brother Thanos, whose name is derived from Thanatos, the personification of death.
2)
The decision to cast pop superstar Harry Styles as Starfox in the MCU's Eternals was a major topic of discussion among fans, bringing a massive new level of mainstream attention to a character who was previously only well-known to dedicated comic book readers.
3)
In his earliest appearances, Eros's powers were vaguely defined. It wasn't until his time in The Avengers that the specific “pleasure stimulation” aspect was codified, and it took over two decades more for a writer, Dan Slott, to fully address the deeply problematic implications of such an ability in a modern context.
4)
Key Reading List: First Appearance - The Invincible Iron Man #55; Joins the Avengers - The Avengers #232; Infinity Gauntlet Saga - The Infinity Gauntlet #1-6; The Trial of Starfox - She-Hulk (2005) #6-7; Dark Guardians - Guardians of the Galaxy (2019) #1-5.
5)
Despite his immortality, Starfox has been killed on at least one occasion. He was murdered by Gamora during the Infinity Wars (2018) event, though like most comic book characters, he was eventually resurrected.