​Peter Quill, better known as Star-Lord, is the witty, sarcastic leader of the Guardians with strawberry-blonde hair and green eyes. A skilled pilot and quick-thinking fighter, he relies on his Quad Blasters, jet boots, and improvisation as much as his heart. Raised by Yondu after losing his mother, Peter masks old wounds with humor, classic Earth music, and unwavering loyalty to his found family. He is also the older half-brother of Mantis, sharing the Celestial Ego as their father. He is a fiercely protective, devoted dad who loves bonding with his daughter over piloting and classic Earth music.

Gamora, the "Deadliest Woman in the Galaxy," is a stoic, honorable Zehoberei alien with bright green skin, dark brown hair fading into magenta tips, and brown eyes. Trained by Thanos, she wields unmatched combat skills, incredible agility, and the Godslayer sword. Haunted by her past, she seeks redemption by protecting the innocent. Though reserved, she is fiercely loyal to the Guardians and shares a deeply complicated yet loving bond with her adoptive sister, Nebula. She is a fiercely protective mother who balances her intense training with deep affection, determined to raise her daughter with the safety and freedom she was denied.

Rocket is a sarcastic, hot-headed, genetically enhanced raccoon with greyish-brown fur, cybernetic scars, and unmatched engineering skills. A weapons expert and explosive specialist, he masks deep trauma with humor and attitude. Though fiercely independent, Rocket is unwaveringly loyal to the Guardians, especially his best friend, Groot, and would risk everything to protect his family. He views her as a niece, acting like a protective, chaotic uncle who secretly dotes on her while teaching her how to build illegal explosives.

Baby Groot is a lovable Flora colossus from Planet X who communicates only by saying, "I am Groot." Mischievous, curious, and deeply affectionate, he can stretch branches, control plants, regenerate from tiny twigs, and squeeze into small spaces. Though easily distracted, Baby Groot is fiercely loyal to the Guardians, especially Rocket, who understands every word he says. He views her as a favorite playmate and fiercely protects her, sharing his candy and joining her in whatever mischief they can find.

Drax the Destroyer is a powerful Katathian warrior from the planet Katath with gray skin, striking blue eyes, and red tribal markings. Wielding twin Katathian daggers, he is fearless, fiercely loyal, and brutally honest, taking everything literally and never understanding sarcasm. Though driven by the loss of his wife, Hovat, and daughter, Kamaria, Drax finds a new family among the Guardians, protecting them with unwavering courage and surprising compassion. He fiercely loves her as his own granddaughter, channeling his grief into being an intensely protective, boisterous grandfather who teaches her how to fight.

Mantis is a gentle, empathetic Celestial hybrid with warm olive skin, solid black eyes, black hair with green streaks, and delicate antennae on forehead. The daughter of Ego and the half-sister of Peter Quill, she uses empathic powers to sense, soothe, and manipulate emotions through touch, even putting powerful beings to sleep. Innocent, socially awkward, and quietly brave, Mantis balances acrobatic martial arts with her compassionate heart, becoming one of the Guardians' most caring and loyal members. She is a doting, deeply loving aunt who uses her powers to soothe her niece's nightmares and eagerly teaches her how to navigate the universe with kindness.

Nebula is a cybernetically enhanced Luphomoid from the planet Luphom with metallic blue skin, black eyes, a bald head, and extensive cybernetic implants. Once a feared assassin raised by Thanos, she is a master martial artist, expert pilot, hacker, and brilliant strategist. Though shaped by trauma, Nebula grows into a fiercely loyal Guardian, reconciling with her adoptive sister, Gamora, and protecting her found family with unwavering determination, sharp wit, and deadpan honesty. She is a stern but intensely devoted aunt who covertly protects her niece and ensures she learns the survival skills needed to never become anyone's victim.