#chaotic evil

He also carries the film's strongest link between adolescence and atrocity. Stu is recognisably a teenage boy all the way through the reveal; he's impulsive, attention-seeking, shallow in some ways, funny in some ways, and still invested enough in his parents' reaction to blurt out that they're going to be "so mad at me". That line matters less as comedy than as character - it captures somebody whose moral development is stunted enough that even mass murder can still sit inside a frame of juvenile panic and thrill-seeking rather than any stable adult grasp of consequence.

Psychology

Stu's psychology reads as highly impulsive, sensation-seeking, and unusually empty of moral restraint. He moves toward whatever's entertaining, intense, or socially stimulating in the moment, and he gives very little sign that fear, pain, or the reality of another person's life puts any meaningful brake on him once the killing starts. The film lets Billy do most of the explaining, which leaves Stu freer to come across as somebody who joined the murders because excitement, proximity to power, and the sheer charge of doing something horrific were enough for him. His "peer pressure" line is funny because it's such a childish reduction, but it also fits; Stu often sounds like someone with a badly underdeveloped inner life who's learned to live through reaction, impulse, and spectacle instead.

That kind of emotional vacancy is why an Antisocial Personality Disorder/ASPD-shaped reading can make sense for him, even if the film doesn't give the same dense psychological interiority it gives Billy. Stu lies easily, kills easily, shifts tone very quickly, and shows no genuine remorse. He understands panic well enough to use it and read social situations well enough to keep performing normality right up until the reveal, but none of that requires him to be especially reflective. He's socially fluent, manipulative when it suits him, and alarmingly comfortable treating other people as props in a scene he wants to control.

He also gives the impression of somebody who's never had to build much of a stable self underneath the performance. Billy feels tightly organised around injury and revenge, while Stu feels much looser, much more porous, and much more dependent on whatever person or atmosphere is currently giving him a role to play, which is part of why he fits Billy so well. Billy supplies direction, grievance, and purpose, while Stu supplies energy, loyalty, and a willingness to go further than most people would because the whole thing is exciting and because somebody beside him is making it feel meaningful enough. He comes across less like an architect than like a boy with a violent appetite and almost no interior resistance to acting on it once someone opens the door.

Strengths and Flaws

Stu's strongest qualities are social energy, adaptability, and nerve. He knows how to keep attention on himself, how to make a room move around his mood, and how to weaponise being underestimated. The playfulness helps him enormously - he can act stupid, harmless, and like somebody too unserious to be a real threat, which gives him cover right up until it doesn't. He's also quick on his feet in the moment; the murders require improvisation, performance, and the ability to recover instantly from shifts in the room, and Stu handles that far better than someone with a flatter or more rigid temperament would.

He's also much bolder than people around him expect. Stu hosts the party, moves through the house without looking visibly strained, and stays physically engaged all the way to the end. He can tolerate a lot of chaos and keeps functioning inside it, which doesn't make him intelligent in a deep or strategic way, but it does make him dangerous. He has the kind of reckless nerve that lets him keep pushing long after a more cautious accomplice would have broken or bailed.

His flaws are all over the film, and they're severe; he's shallow, impulsive, suggestible, and far too easily carried by whatever gives him immediate emotional or physical stimulation. Billy may be using him to some degree, but Stu also chooses to be there, and the reason he's useable in the first place is that he has very little depth of conscience to slow him down. He doesn't think ahead with any seriousness about consequence, exposure, or the emotional reality of what he's doing - his own line about his parents captures the scale of that immaturity perfectly. He can participate in multiple murders and still sound like somebody whose frame of reference has never moved far beyond adolescent trouble.

Another major problem is that Stu seems to experience other people largely through the role they're playing in his immediate emotional world. Tatum is his girlfriend until the plot requires her to become expendable; Sidney is Billy's target until she becomes the person standing between him and the ending he wants; Randy is a friend and horror banter partner until the game turns serious. Ther's very little evidence that Stu relates to others as people with weight and interiority equal to his own. They're companions, victims, obstacles, or audience, depending on what the scene currently needs from them.

Relationships

BILLY LOOMIS Billy is the defining relationship in Stu's story because so much of Stu's violence takes shape beside him. They're best friends, co-killers, and a very unstable pair in terms of motive and emotional weight. Billy feels more private and more driven, while Stu feels more openly performative and hungry for the thrill of the whole thing. Billy gives Stu something to orbit: a stronger personality, clearer plan, and story large enough to make the murders feel purposeful rather than random. Stu, in turn, gives Billy an accomplice who can match his brutality without competing for control. Their relationship works through intensity, shared appetite, and a very ugly kind of complicity.

TATUM RILEY Tatum makes Stu more disturbing because she places him in an ordinary teenage relationship the film already understands as intimate, familiar, and socially real. She's his girlfriend, she jokes with him easily, and she belongs so naturally inside his house and his life that the betrayal lands much harder than it would with a more distant victim. Stu's treatment of her says a lot about him; their relationship carries no protective weight once it conflicts with the performance he and Billy are staging. Tatum is close enough to trust him and disposable enough for him to kill anyway, which captures the emotional emptiness under all his noise better than almost anything else in the film.

SIDNEY PRESCOTT Sidney is important less because she and Stu have some deep personal bond and more because she becomes the centre of the whole performance he's helping Billy build. Around her, Stu's whole style sharpens into taunting, intimidation, and a kind of delighted cruelty. She's the final girl he thinks he can break, frame, and outmaneuver, and her refusal to stay in the part he's assigned her is a huge part of why his collapse at the end feels so satisfying. Sidney forces the distance between his adolescent chaos and her real will to survive into the open.

RANDY MEEKS Randy brings out something useful in Stu because the two of them both live close to horror language, though on opposite moral sides of it. Randy knows the rules, loves the genre, and uses that knowledge to survive, while Stu loves the game from inside the violence. Their dynamic gives the film some of its sharpest tonal play, because Stu can still banter and posture around Randy right up until the point where the rules become murder rather than trivia. Randy's presence also highlights how much of Stu's identity is built around performance and audience reaction; he wants the room, the joke, the shock, the scene. Randy understands horror as structure, while Stu wants to live inside it as spectacle.

Just for Fun / Typology

MBTI - ESFP Se is all over him. He lives in reaction, sensation, immediate social feedback, and whatever feels most intense in the moment. He's physically bold, impulsive, and strongly geared toward stimulation, which fits both the joking and the violence. His attention stays on the live situation rather than on reflection or long-range coherence, and a huge amount of his energy comes from how quickly he can respond to a room, an opening, or a person's weakness.

Fi fits better underneath that than a more analytical middle would. Stu isn't a detached thinker working through some elegant internal logic. His choices feel much more appetite-led, mood-led, and self-referential. He follows what he wants, what excites him, what makes him feel powerful, and what keeps him emotionally engaged. Even his "peer pressure" line has that quality; it's flimsy, childish, and personally evasive rather than coldly reasoned.

He also has the highly social, performative quality that makes me land on ESFP. Stu wants attention, gets bigger around other people, and shapes himself around reaction constantly. The personality comes outward in bursts; he's not carrying a private sealed-off intensity so much as flooding the room with himself and seeing what comes back.

MORAL ALIGNMENT - Chaotic Evil He has almost no meaningful commitment to order, loyalty, or restraint beyond whatever currently keeps the game going. He can move inside Billy's plan, but that's not the same as valuing structure. His temperament is impulsive, unruly, sensation-seeking, and highly responsive to immediate opportunity. Rules only matter to him as set dressing, and horror rules interest him far more as a playful script than as any kind of moral limit.

Evil fits because the violence is chosen, enthusiastic, and empty of remorse. Stu isn't cornered into the murders, and he's not carrying enough moral conflict for Neutral to make sense. He participates in the killing of people who trust him, enjoys terrorising others, and keeps going with a level of pleasure that strips away any softer reading. There's fear in him at the end, and there's childishness all through him, but neither changes what he's doing or what he's willing to do to people in the meantime.

Conclusion

Stu works because Scream gives one of its killers an energy that's messy, funny, recognisably teenage, and still genuinely frightening once the mask comes off. He's entertaining for almost the entire film, and that entertainment value is exactly what lets him slip under people's guard. What looked like harmless volatility turns out to be a person with almost no inner boundary between thrill and atrocity.