[3] His primary power is the ability to stimulate the pleasure centers of people's brains, allowing him to control their emotions and actions.

The character made his live-action debut in the Marvel Cinematic Universe film Eternals (2021), portrayed by Harry Styles.

This contrast aligns with writer-artist Jim Starlin's intention to create two characters embodying semi-Freudian concepts: Thanatos and Eros, representing death and desire.

[10] Eros is a member of the Eternals, a genetic offshoot of humanity, that left for deep space from Earth thousands of years ago and settled on Saturn's moon of Titan.

He grew up on Titan to be a fun-loving, carefree womanizer and adventurer in contrast to his brother Thanos, a power-hungry, nihilistic conqueror.

Years later, in a subsequent campaign of terror by Thanos, Eros fought alongside Titan's handful of survivors.

[12] Eros was freed from captivity, met Iron Man and Moondragon, and assisted Mar-Vell and the Earth hero-team called the Avengers in the first major defeat of Thanos.

[16] No longer bound by duty on Titan, Eros left the war-torn moon, seeking out pleasure and recreation on humanoid-inhabited worlds.

Starfox was forced to witness various cosmic murders, power plays, the personal deaths of heroes he knew and other atrocities.

[44] Starfox spent time with the son of Mar-Vell, Genis-Vell, and attempted on multiple occasions to assist him and steer him in the right direction.

[volume & issue needed] Starfox was part of a re-gathering of Avengers when Morgan Le Fay attacked all current and ex-members.

The law firm which employed her, Goodman, Lieber, Kurtzberg & Holliway, was contracted by Mentor to defend his son from the allegations.

She-Hulk dealt Starfox a savage beating, giving him no chance to defend his actions, knocked him unconscious, finally duct-taping his mouth shut to ensure that he could not use his abilities to elude punishment.

She discovered that Starfox did not use his abilities to influence her decision to have sex with him, but that he was deliberately responsible for her sudden infatuation with and marriage to John Jameson.

He plays a key role in the Avengers' victory, using his powers on the half-organic Ultron to force the villain to have an emotional breakdown.

They use the technology to go to the point where Eros departed Zelchia and offers Ghost and his people even more advanced weaponry from the Shi'ar.

After a year, Eros manages to unite the planet's three main races to fight the threat of Thanos and his army, which was really all part of his plan.

Eros decides that the only way to end the Mad Titan's nihilism is to go back to the day Thanos was born and kill the infant before he becomes a threat.

Thankfully, Kang, on behalf of Adam, goes to the point when Eros and Pip are about to go talk to Thanos' past selves and fetches them in his ship.

Starfox begins to recruit warriors to find Gamora, the most likely candidate to be Thanos's new body, as they form the Dark Guardians, which causes Cosmic Ghost Rider to side with them.

Wraith brings up the issue of the Black Order, but Starfox assures they are searching for them, and Nebula states that the team should track down Nova to find Gamora's location.

When Gladiator and Cosmic Ghost Rider order him to back off, Nova takes the chance to fly off, but the team plans to track him down again.

However, Gamora's execution was interrupted by the Asgardian goddess of death Hela and the Black Order who subdued the Dark Guardians in short time.

[66] Eros psionic abilities give him considerable control over his body's cellular structure and the matter around him, allowing him to enhance the durability of his own cells or make minor transmutations to nearby objects.

[67] Furthermore, Eros possesses a powerful healing factor, allowing him to recover rapidly from damage, and is virtually immortal.

[68] Marc Buxton of Den of Geek stated that Eros is recognized for his charm, roguish nature, and adventurous spirit.

They found that, as a love god with an appreciation for the finer things in life, Starfox stands out as a distinctive figure.

They also suggested that, as Marvel continues to expand its Cinematic Universe, Eros should not be overlooked, as he has the potential to become a key figure—whether as a romantic foil in the Star-Lord and Gamora relationship or as a pivotal character linked to the threat of Thanos.

The announcement of casting Styles as Eros elicited mixed reactions from fans,[70][71] although his appearance was met with "deafening screams and cheers" from the crowd at the premiere of the film on October 18, according to Business Insider.

[72] Patrick J. Hetherington of Screen Rant noted that the scene sparked considerable interest, not only due to Styles' fame, but also because it explicitly mentioned Thanos and highlighted Eros' fraternal connection with him.