The Myers-Briggs® Personality Types of The Beast In Me Characters
If you’ve ever watched a true-crime documentary and thought, “Wow, this is stressful, but also… tell me everything,” then The Beast in Me is the show your intrusive thoughts have been training for. It’s moody, twisty, full of morally questionable choices, and it practically begs you to psychoanalyze every character.
(Unfortunately, Netflix does not pay us for this. Rude.)
The story begins with Aggie Wiggs, a Pulitzer-winning writer whose life blew apart four years ago and never quite snapped back into place. She’s grieving, blocked, isolated, and the plumbing in her house seems to be grieving with her. Enter Nile Jarvis, the kind of neighbor who brings over a bottle of wine and a pair of giant murder-dogs. He’s charming, intense, and has Resting “Everyone Thinks I Killed My Wife” Face, which is exactly as fun as it sounds.
What unfolds is part mystery, part psychological cat-and-mouse, and part “please don’t Google your neighbors, it never ends well.” Everyone in this show acts like they’re the smartest person in the room, which is hilarious because half of them are one impulsive decision away from ruining their lives.
So let’s dive in and see what makes these characters tick, snap, spiral, and occasionally make decisions that would get the rest of us arrested.
Not sure what your personality type is? Take our personality questionnaire here. Or you can take the official MBTI® here.
Aggie Wiggs — INTP
Aggie was a challenge for me to type because she’s operating at an unhealthy level, caught in the whirlwind of grief and fury and emotional chaos that can disrupt anyone’s typical type patterns. That said, Aggie dissects motives, replays conversations, pokes holes in narratives, and asks the kinds of questions that make people suddenly need a glass of water. The truth has to make internal sense or she can’t rest.
I considered INTJ for Aggie for a while. In fact, when I first wrote this article I wrote her as INTJ, but then too many contradictions kept coming to my mind. I don’t think she’s using Ni (one grand internal vision). She’s using Introverted Thinking and Introverted Sensing, the INTP ouroboros where analysis circles back into old impressions, memories, personal reference points, and emotional flashbacks she doesn’t want to admit she has.
Grief pulls her into a Ti–Si loop, and it is brutal.
She’s endlessly replaying the past, cross-referencing every detail, trying to rationalize a tragedy that will never make rational sense. She wants her analysis to confirm her inner narrative—something she knows is biased but feels too tender to challenge.
INTPs have tertiary Introverted Sensing. If you’re new to type and you’re like “What the heck is that?” it basically means that on top of their theorizing and exploring, they also crave a sense of stability and home. They can get stuck replaying the past, going over details, and rehashing what was, particularly when they’re stressed and seeking comfort (which Aggie deep down is really looking for, even if she doesn’t admit it).
She wants home.
She wants Shelley.
She wants the life that made emotional sense before it was ripped away.
That’s tertiary Si whispering, “Go back. Retreat. Rebuild what was.”
But she can’t, and the cognitive dissonance is tearing her apart.
Then there’s her inferior Extraverted Feeling, which is basically a fire alarm with a personality. When she’s caught in chronic stress, she lashes out emotionally because she genuinely cannot regulate her feelings once they reach a certain threshold. INTP Fe is like a pressure valve: it stays quiet until the whole system explodes. If you want to know more, read up on INTP grip stress here.
So yes, she’s awkward with small talk. She’d definitely rather interrogate a suspect than chit-chat at a neighborhood party. But she also wants love and stability desperately, even if she has no idea how to ask for them without sounding like a malfunctioning robot.
Aggie is a textbook INTP under catastrophic stress:
Dominant Ti: obsessive internal analysis, truth-hunting, surgical questioning
Auxiliary Ne: curiosity, skepticism, “let’s gather ALL the possibilities before we decide”
Tertiary Si: desire for some kind of tradition (hence the old, giant house), replaying the past, craving stability and really pissed off that it all got disrupted.
Inferior Fe: emotional eruptions, longing for connection, social awkwardness
Nile Jarvis — ESTP
Look, people love typing him ENTJ because he’s intense, powerful, and rich. But being a power hungry sociopath (or psychopath?) does not automatically give you Te. Ask half of Wall Street.
Nile is a guy who can be charming one minute, insulting the next, and dancing the moment after that. He doesn’t strategize so much as pounce because he feels like it. He acts fast, cleans up later, and, honestly, doesn’t always clean up (just ask his uncle).
He’s an unhealthy, demented ESTP: impulsive, perceptive, thrill-seeking, people-reading like he’s scanning their aura for weaknesses. He lives by his instincts (thank you Extraverted Sensing) but he’s also analytical enough to troubleshoot at least some of the problems he creates for himself (Ti). He also can go from being blunt and concise to being charming and funny. His Fe is equally noticeable—low but present. He wants to be liked. He wants reactions. He wants to be… interesting. And he uses his read on people to get exactly the emotional charge he wants from them, whether it’s fear, admiration, or a spark of flirtatious danger.
The recklessness, the volatility, the emotional impulsivity, the thrill of pushing buttons just to see what jumps, all make me think ESTP for Niles. If you disagree, just let me know your perspective in the comments.
Nina Jarvis — ESFJ
Nina is the elegant version of “smile through the chaos.” She knows how to present herself, how to soothe social tension, how to manage an image: her own, Nile’s, the entire Jarvis brand.
She’s warm, polished, and relationally intelligent. She’s the one sending wine to Aggie when the dogs bother her. She’s the one who asks questions that feel friendly but are actually reconnaissance. She’s the one who says, “Why would she invite you in if she had him upstairs?” and knows something isn’t adding up. But while she may be suspicious, she’s going to play the part required long enough to get to a secure position.
ESFJs are good at reading people, sensing emotional tension, and harmonizing the entire environment. Aggie seems tense? Smile and invite her for a walk. Niles might be a murderer? She knows which buttons to press to either A) cause him to erupt or B) cause him to chill out long enough for her to get to a position of safety.
She’s charming, strategic in a soft-power way, and emotionally attuned enough to play Nile like a violin when she needs to.
Martin Jarvis — ENTJ
Martin is what happens when Extraverted Thinking and Introverted Intuition gets enough money and power to hire other people to do its dirty work. Strategic, big-picture, legacy-driven, emotionally restrained, and allergic to his son’s impulsivity, he is ENTJ leadership distilled. And I kind of loved him…maybe that’s just because he was played by Jonathan Banks who is a legend in my mind.
Martin Jarvis calculates and makes things happen even when everyone else has given up (including Niles). He directs and strategizes in a quick, efficient way, and can’t seem to figure out why nobody else sees what needs to be done and is doing it yesterday.
And Martin Jarvis does have moral boundaries—ENTJs often do—but he places them where they won’t interrupt the mission. He’s not gleefully malevolent. He’s simply… efficient. Brutally so. While Nile is dancing and charming and self-sabotaging, Martin is ten steps ahead trying to preserve the empire before his son burns it down.
Shelley Morris — ISFP
Shelley is the anti-Aggie. Calm where Aggie is frantic. Soft where Aggie spikes into sharp edges. She feels deeply, but she doesn’t go to war with her feelings; she paints them.
Dominant Introverted Feeling in its healthiest form is quiet, authentic, principled. Shelley doesn’t need to blast her grief on the outside world. She just lives it. Unlike Aggie, who doesn’t seem to know where to direct her feelings at all, Shelley is healing in her own private, artistic way.
She’s deeply individualistic, steady, and perceptive about people—but she’s not out to prove anything. She’s not vengeful. She wants to get back to a place of inner harmony and meaning, even if life has gutted her. That said, I really didn’t see enough of Shelley in the series to be able to say with absolute certainty that she’s an ISFP. Most evidence seemed to point to this, but she wasn’t a very deeply explored character.
Brian Abbott — ExTP (likely ENTP or ESTP)
Brian is either:
- an ENTP who forgot to eat because he was too busy chasing conceptual rabbit holes, or
- an ESTP who forgot to eat because he was too busy breaking laws in pursuit of justice.
Either way, he’s an ExTP through and through.
He’s quick-witted, impulsive, obsessive, skeptical, and absolutely terrible at letting go of an unsolved puzzle. His life has been swallowed whole by the Jarvis case, and honestly, did he even resist? It feels like he just dove in headfirst yelling, “ONE MORE CLUE AND I’LL BE FINE.”
What muddies the typing is the alcoholism, the self-destruction, and the hyperfixation—those can look like unhealthy Se or unhealthy Ne.
We need more data, but he’s definitely not a Fi user, definitely not a J type, and definitely living on the edge in true ExTP fashion.
What Do You Think?
The Beast in Me is a reminder that personality isn’t just who we want to be. It’s who we become when life corners us, when grief rearranges our insides, when instinct overrides logic, when our cognitive functions start reacting to attacks and pressures from the outside world.
And that’s why analyzing these characters is much fun!
Because in the mess, the mystery, the dysfunction, and the psychological brinkmanship—you can see pieces of yourself. The parts you hide. The parts you’re proud of. The parts you’re still trying to understand.
But what do you think the character’s personality types are? I’d love to hear your opinions and thoughts in the comments!
