Aaron Reece / Molecule Kid
Son of the supervillian Molecule Man, Aaron Reece has recently acquired his father's invention: a device that allows the user to manipluate non-organic matter on the molecular level. He doesn't want to follow in his dad's footsteps and for most of his debut episode just wants to be left alone. Tony eventually convinces him to join SHIELD and talks Nick Fury into taking him into its Academy Hero program.
- Aborted Arc: At the end of Aaron's debut episode, he (and Fury) are convinced that he should join up with Fury's SHEILD Academy Hero Program, the same one that Spider-Man is in. Despite him departing with Fury in the end, and despite a rather powerful and emotion-filled episode introducing the character, Aaron is nowhere to be seen or heard after the episode ends. Not even the 3rd and 4th seasons of Ultimate Spider-Man which expands the hero count and even shifts focus to the Academy's HQ sees any hide or hair of Aaron.
- Adaptational Wimp: A Downplayed example. The original Molecule Man, Aaron's father, can manipulate non-organic matter of the molecular level with a wand. The one from the comics does not need any wand: it's his innate power. And his weakness with organic matter was just a self-imposed limitation, that he has already left behind.
- Casting Gag: Daryl Sabara voices Molecule Kid, who looks a lot like Rex Salazar.
- Canon Foreigner: Aaron was exclusively created for the show.
- Cursed with Awesome: The wand only works for him and his dad, and while it's powerful, it's also wrecked his family, sent his dad to prison and put him in AIM, and by extension HYDRA and Red Skull's, crosshairs.
- Cut Lex Luthor a Check: Reece Sr. invented what Tony Stark rightly called "the invention of the century" and the only thing he could think of using it for was to go on a crime spree.
- I Am Not My Father: Part of Aaron's internal struggle during his debut episode. The only reason he causes any trouble is because he uses his dad's wand to evade the AIM soldiers who are hunting him, and then uses it against Black Widow and Hawkeye in paranoid self-preservation because he mistakes them for more of AIM. Though his dad's life choices has made Aaron's life considerably harder, he doesn't actually want to be like his dad. That's why Tony convinces Fury to take Aaron in to Fury's SHIELD Academy Hero Program, and also why Aaron accepts the offer once it's extended.
- In the Hood: Primarily because he's trying to remain as inconspicuous as possible from the AIM minions hunting him. It's also symbolic of his paranoia and his internal struggle with the issues with his dad. His hood comes off and he leaves it off after a certain point in the episode, particular once he's been saved and once he goes with Fury and joins his SHIELD Hero Academy.
- Reality Warper: He can manipulating matter at its most basic level.
- Story-Breaker Power: How his dad's wand is viewed and treated in-universe.
- What Happened to the Mouse?: Aaron's early series episode seemed like it was setting him up for great things. He goes off with Fury to take part in the SHIELD Academy Hero Program and become a hero and do good like he really wanted to. He's never seen again after this episode. Not even during the more Academy focused parts of Season 3 and 4 of Ultimate Spider-Man, nor the later Seasons of Avengers, Assemble!'' that starts introducing and bring in young new-blood amongst the Avengers' ranks. One guess as to a possible reason for the Aborted Arc is because Molecule Kid's powers where seen by the writers as too much of a Story-Breaker Power for a good-guy to have. The creative team shake-ups through both series' lives may have also had something to do with it.
The Allfather of the Nine Realms, and the king of Asgard. One of the most powerful beings in the universe, he is also a fair leader to boot. Though he holds no malice towards Midgardians, he believes they are weak and insignificant in the grand scheme of things. He wishes Thor would choose Asgard over Earth.
- A Day in the Limelight: All Father's Day.
- Big Eater: Comes with being an Asgardian.
- Big Good: He may count, being the Allfather and a far more powerful benevolent being than anyone else we've seen thus far.
- The Big Guy: he's easily the same height as the Hulk and, hilariously, pulls him into a one armed hug.
- Blade on a Stick: His spear Gungnir. Further, in this particular incarnation Gungnir is the source of a vast majority of his power. Anyone who holds it and knows how to access its power can be as powerful as Odin.
- Boisterous Bruiser: it is quite obvious where Thor gets it from.
- The Cameo: He shows up in the prologue of Planet Doom, and later has a larger role.
- Chuck Cunningham Syndrome: Became absent from the series after Season 1, then comes back in Season 4.
- Defrosting Ice King: No, he's not Laufey, but he's this over the course of Allfather's Day.
- Did You Just Punch Out Cthulhu?: Everyone is quite understandably horrified when Hulk knocks him through a wall. Thankfully, Odin is merely impressed by Hulk's strength.
- Hold Your Hippogriffs: Amusingly, Odin himself swears by his own beard alongside his son.
- Jerk Ass Gods: Not as bad as some examples, but Odin views humanity as beneath him, does not mind putting innocents in danger to prove a point, abrasive, and is an emotionally-distant, impossible to please father with the time-travelling episode from Hulk and the Agents of S.M.A.S.H. shows he has always been like this. Despite this, he does care for his children and Asgard and is a bit more reasonable to those who have proved their worth... even if you have to go through several levels of Jerkass first.
- Noble Bigot: He holds no real grudge against humanity, and when drained of his power, begs Mangog to take him but spare Earth, but deems them weak and disappointing. Ultimately the team changes his mind in All Father's Day.
- Proud Warrior Race Guy: He starts to think better of the Avengers after Hulk hits him.
- Reasonable Authority Figure: Despite his temper, he is ultimately this, giving the Avengers the chance to prove their worth.
- The Worf Effect: Even he's no match for Loki having the Eye of Agamotto.
- Worthy Opponent: Immediately recognizes Hulk as one, claiming he hasn't been hit so hard since he fought Surtur.
A bizarre little imp from beyond the stars. Comes to Earth seeking to make a star out of Falcon.
- Adaptational Badass: His comic book self was merely a prodigious Shapeshifter. This version can bend reality at will. This isn't the first alternate-universe version of the Impossible Man to get that upgrade, though.
- Beware the Silly Ones: Just in case his goofy personality fools you, he has a S.H.I.E.L.D. threat rating of 10
- Cameo: Briefly seen in Mojo World sitting at a bar, next to Star-Lord, watching Mojo's blood sport.
The ruler of Valhalla, the land of the dead for Asgardians. Loki approaches her in a bid to get rid of Thor and conquer the Earth.
- Ambiguously Evil: Sure, she opposes the characters, but she never showed any true desire to conquer or enslave humanity like the maniacal Loki. All she wanted was entertainment.
- Adaptational Heroism: While no straightforward hero, she definitely doesn't belong in the "Other Villains" folder on this page.
- Dark Is Not Evil: Again, "evil" is a strong word to describe her, but the dark motif remains.
- Deal with the Devil: Agrees to one with Loki, her being the devil in the scenario. And true enough, she ends up betraying him while sticking to their agreement.
- Don't Fear the Reaper: It's truly hard to get a fix on her, but she's never shown to be malicious.
- The Grim Reaper: Being the lord of Valhalla and all.
- Femme Fatale: She's almost always rather seductive and uses a very husky tone of voice when addressing anyone.
- Hot Witch: She's certainly good-looking (in an Evil Is Sexy sort of way), even if her status as "good" or "evil" is up for debate.
- It Amused Me: Her primary goal? Finding some new entertainment, having bored of watching undead Asgardians fight each other.
- Ms. Fanservice: She's the most gratuitous fanservice-y female character on the show thus far, wearing some rather revealing, form-hugging attire.
- Sadly Mythtaken: She's portrayed as the ruler of Valhalla and not Niflheim as in Norse Mythology. Even the comics didn't make this mistake.
- The Smurfette Principle: She holds the distinction of being the first female "villain" on the show, at least until Zarda, who's definitely not Ambiguously Evil, later showed up.
- Stripperific: Her outfit.
- She's Got Legs: Hela is shown to have a very leggy figure through her form-hugging attire. Her athletically shapely legs are made even more attractive through the fact that she was shown to be crossing them rather sexually throughout her debut episode and they are shown to be very detailed through her costume.
- Unrelated in the Adaptation: In the comics and myths, Hela is Loki's daughter, but in this continuity, Loki and Hela don't have any sort of relationship to speak of, at least none that begets their familiarity.
A robot designed by Howard Stark in order to help, protect, and play with Tony Stark.
- Adaptational Badass: Able to Absorb the Infinity stones which should be far beyond the power of any earthly technology, especially one not built for a such a thing. Would never be able to happen in any other adaption.
- Adaptational Heroism: While no straightforward villain, Arsenal was most often portrayed as a malfunctioning menace in the comics. And had never been an Avenger in the comics.
- Benevolent A.I.: Helps Tony in his job. At first.
- Broke Your Arm Punching Out Cthulhu: He may have helped defeat Thanos, but ends up being blown to bits.
- Composite Character: Of both his comic counterpart and Ultron. Much like the show's incarnations of the Guardians, Heimdall, Volstagg, Odin, and many others, Ultron more resembles his MCU incarnation, with Jim Meskimen even using the sinister drawl James Spader uses. His design even resembles a fusion of his MCU appearance and his form from Annihilation Conquest.
- Dangerous Forbidden Technique: He may use the energies he acquired from the beyond but ends up blown as a result.
- Early-Bird Cameo: Like the Guardians of the Galaxy, Ant Man, and Doctor Strange below, Ultron makes his debut in this series a while before his starring MCU film was released.
- Evil Sounds Deep: Once Ultron takes over.
- Famous Last Words: "Goodbye Tony, my friend."
- Heroic Sacrifice: In The Ultron Outbreak, Arsenal gets to reawaken one last time. Arsenal willingly decides to fly himself to the sun, as destroying himself would also destroy Ultron and save Tony.
- Hijacked by Ganon: Howard Stark's programming apparently had a hole that allowed Ultron to take over, just as Thanos had been defeated.
- The Juggernaut: What he is now that he's absorbed the power of the Infinity Stones.
- Walking Spoiler: Thanks to the ending of the second season.
- We Can Rebuild Him: What Tony does to him after he got blown to bits.