Relationships in superhero stories are usually pretty straightforward. You get the iconic duo, a bit of "will-they-won't-they" tension, and eventually, a heroic sacrifice or a wedding.
But then there’s Rudy and Monster Girl.
If you've followed Robert Kirkman’s Invincible—either the long-running Image Comics series or the hit Amazon Prime Video adaptation—you know these two aren't your typical power couple. It’s messy. Honestly, it’s one of the most unsettling, tragic, and deeply human arcs in modern fiction.
People often call it "the Flaxan saga," but that's just a label for a millennium of psychological warfare and domestic heartbreak.
Who Exactly Are Rudy and Monster Girl?
To understand why their dynamic is so jarring, you have to look at who they were before they became "Rudy and Monster Girl."
Rudolph Conners, known to the world as Robot, started as a literal brain in a vat. He was a 30-year-old genius with a body so deformed he couldn't survive outside a specialized life-support tank. He saw the world through sensors and metal. He didn't have a childhood. He had calculations.
Then you have Amanda, aka Monster Girl. She’s actually in her mid-twenties, but she looks like a 12-year-old. Why? Because every time she transforms into her massive, hulking ogre form, she de-ages. It's a curse from a magic-practicing grandmother of an ex-boyfriend. Pretty spiteful, right?
They found each other because they were both "trapped." Rudy was trapped in a jar; Amanda was trapped in a body that was disappearing into infancy.
The Rex Splode Clone Incident
Things got weird fast.
Rudy didn't just want to be with Amanda; he wanted to be for Amanda. He used the Mauler Twins to clone a new body for himself, using DNA from his teammate Rex Splode. He chose a version of Rex that was roughly the same biological age as Amanda’s current state.
Some fans find this romantic. Others find it incredibly creepy.
"I did this for you," Rudy tells her in the series.
Is it a grand gesture to literally rewrite your biology to match someone else's trauma? Or is it the ultimate stalker move? The show and the comics don't really give you an easy answer. They just show you the consequences.
The Flaxan Dimension: 700 Years of Chaos
The real turning point for Rudy and Monster Girl happens when they get pulled into the Flaxan dimension. In our world, they’re gone for a few months. In that dimension? They live through several lifetimes.
They don't just survive; they conquer. Rudy uses his hyper-intelligence to lead a revolution, eventually becoming the Emperor of the Flaxans.
This is where the cracks turn into canyons.
- Rudy's Obsession: He becomes a dictator. He’s "doing it for the greater good," which is the classic villain excuse, but he genuinely believes he's fixing a broken society.
- The Emotional Distance: While Rudy is busy being a tyrant, Amanda is actually living. She sees the suffering his "order" causes.
- The Betrayal: Amanda eventually supports a rebellion against him. She even has an affair with a Flaxan princess, Zaxal.
When they finally return to Earth, they aren't the same people. They are old souls in young-looking bodies, carrying centuries of resentment. Rudy is cold. Amanda is exhausted.
Why Their Story Matters in 2026
We're seeing a lot of "deconstructionist" superhero media lately, but Rudy and Monster Girl hits differently because it deals with the passage of time.
Most stories ignore the mental toll of immortality or long-term leadership. Rudy becomes "Robot" again, not because he's in a metal suit, but because he loses his empathy through centuries of cold logic. He stops seeing people and starts seeing variables.
In the comics, this leads to Rudy trying to take over Earth to "save it" from itself. He becomes the ultimate antagonist because he thinks he's the only one smart enough to be the protagonist.
What Most People Get Wrong
A common misconception is that Rudy "turned evil" because of the Flaxan dimension. If you look closely at his early interactions, the seeds were always there. He was always willing to manipulate—like when he helped the Mauler Twins escape just to get his body. He didn't turn evil; his power simply grew to match his lack of boundaries.
Actionable Insights for Fans
If you're trying to keep up with the lore or writing your own analysis of the series, keep these specific details in mind:
- Check the Belt: In Invincible Season 3, Rudy develops a digital belt for Amanda. It's supposed to "trick" the curse so she stops de-aging. Pay attention to this—it’s a symbol of his need to control her "problem" through technology rather than emotional support.
- The Aging Math: Remember that in the Flaxan dimension, time moves faster. Rudy and Amanda are technically the oldest characters on the team, potentially centuries older than even the Immortal, depending on which timeline gaps you count.
- Watch the Names: He goes from Robot to Rudy, then back to being called Robot by those who fear him. The name change usually signals where his humanity stands at that moment.
The tragedy of Rudy and Monster Girl is that they were the only two people who could truly understand each other’s isolation. They had a chance at something nobody else in the universe had. Instead, they let time, power, and secrets turn that connection into a weapon.
If you're catching up on the series, look for the small moments in Season 3 where Rudy chooses logic over Amanda’s feelings. Those are the red flags that lead to the eventual collapse of everything they built.
Read the original Image Comics issues #92 through #100 if you want the full, unedited weight of what they went through in the Flaxan world. It's a rough read, but it's essential for understanding why Rudy eventually becomes the man he does.