G.I. Joe

A secret global special mission force made up of highly trained individuals from all subdivisions of the military, collectively known as G.I. Joe. Their purpose is to defend human freedom against villains hidden deep within the shadows that are national security level threats, such as the terrorist groups Cobra and V.E.N.O.M.

In General

Adaptational Badass: All characters from the team are Badass Normals in their canon series. Since the story is taking place in the setting of MHA, most members of G.I. Joe have their own respective Quirks that they use to fight villains that threaten the peace of the world.
Battle Cry: "YOOOO JOOOOOEEE!"
Big Good: They are an international organization dedicated to protecting the fragile peace of the world from national security-level threats.
Code Name: Each and every member has their own that they're identified with.
Secret-Keeper: They eventually come to know of the Cybertronian war between the Autobots and Decepticons.
Walking Spoiler: Their existence is a big reveal for the second story arc.

Japanese Branch

Snake Eyes

??? — Snake Eyes

Quirk: Quirkless

https://static.tvtropes.org/pmwiki/pub/images/se_013_cover_b_se_coloured_2_small.jpg

An unknown Hero who for some reason refuses to divulge anything about himself. He watches the Sports Festival and every few years tries to recruit someone to intern with him, but none have chosen so far due to knowing very little about him.

Badass Normal: Tiger Claw confirms he's Quirkless, so everything he's capable of is due to his training and meditation techniques.
Blade Enthusiast: Snake Eyes carries multiple blades around his person.
Charles Atlas Superpower: Upon his introduction, Snake Eyes has shown feats that go beyond what the average human is capable of, showing that he's gone through some extensive training.
The Comically Serious: Due to his inability to speak and his attire, it's easy for Snake Eyes to look completely serious even in a casual moment like offering a bento to Kyouka.
Dark Is Not Evil: Of course, being dressed from head to toe in black and being a ninja who can blend in with the shadows with ease, but he's a hero and Kyoka can't help but think he's also cool-looking.
Easily Forgiven: He holds nothing against Kyoka for attempting to spy on him and takes equal responsibility for the misunderstanding between them.
Flash Step: He can move faster than anyone can blink. This was how he could stop Tiger Claw from attacking Optimus Prime while he was in his alt mode.
The Ghost: He's a Hero no one has ever heard of. There are no records of his history, where he came from, or what his real name is. Many Heroes ran investigations to find out who he is, all of them ending with zero results. Only very few people like Nezu and Edgeshot are aware of his true nature.
Good All Along: Only from the perspective of the U.A. students and the other heroes, who were suspicious of him and his agency due to his secrecy, when in fact he's a hero with benevolent intentions.
Hidden Depths: He makes excellent bento boxes as a hobby, since there's not much to do at his base when not in a mission or training.
Ki Manipulation: Despite not having a Quirk of his own, Snake Eyes is capable of this to a degree through the use of a meditation technique that lets him channel his chi to enhance the strength of his strikes.
Not So Above It All: Despite the seriousness of the situation, even he looked sheepish when questioned about his secrecy regarding his internship with Kyoka.
One-Man Army: He is able to easily dodge and slice through an army of Vehicons without breaking a sweat. Made even more impressive as all this is without the use of a Quirk.
One-Way Visor: Snake Eyes wears a cool-looking white visor to cover his eyes.
Only Known by Their Nickname: He only goes by his hero name as he refuses to give his real one.
So Proud of You: At the end of her internship, Snake Eyes lets Kyoka know that she was a wonderful student which caused the punk rocker to burst into tears of joy.
Super-Strength: He tore Kyoka's school blazer with a wooden sword. And that's pure training since he's Quirkless.
Unseen No More: After being teased, mentioned, and talked about a lot; Snake Eyes finally makes his appearance at the end of Chapter 49.
Un-Sorcerer: Snake Eyes is a part of the minority population of his world that doesn't have a Quirk. Still doesn't stop him from kicking Decepticon ass though.
Utility Belt: He wears a black one with multiple pouches.
The Voiceless: Snake Eyes is unable to speak due to a massive scar on his trachea given to him by an old adversary.

Jinx