The thing Harry hated most about Tom was not that Tom was cruel.
Cruelty, at least in its simpler forms, was easier to understand. Harry had seen enough of it already in his life to know its shape. Cruel people enjoyed power too obviously. They liked humiliation, liked fear, liked the visible imbalance between themselves and whoever stood lower in a given moment. Dudley had been cruel in that way. So had Draco when he forgot himself. Even Snape, for all his complexity, allowed contempt to become visible often enough that one never had to wonder whether he meant it. Tom was different. Tom rarely seemed to enjoy anything in the ordinary sense. He was not driven by the easy heat of meanness. His coldness had structure.
What Harry hated—what truly got under his skin in a way that kept returning even when he wanted to leave it alone—was that Tom made him feel clumsy.
Not in spellwork. Harry had already accepted that there were areas in which Hermione would always be faster, and others in which certain Ravenclaws would always seem more naturally ordered. That did not bother him much anymore. But whenever he spoke to Tom, whenever he tried to confront the pattern or force it into language, he felt as though he had entered the exchange half a move late. Tom never seemed to overpower him in the crude sense. He did something worse. He made Harry aware, mid-conversation, of the imprecision of his own thinking. He turned instinct into something that looked embarrassingly underprepared.
That feeling bred avoidance for several days.
Harry did not seek him out. He did not stop noticing him either. Tom remained a point of pressure in the school's atmosphere, one Harry could no longer quite ignore even when trying to focus elsewhere. But Harry kept his distance because he had begun to understand that direct confrontation with Tom, unless perfectly timed and perfectly phrased, usually left him more unsettled than before. Hermione would have called that useful information. Harry just found it infuriating.
Eventually, irritation overcame caution.
The day had thinned into evening by the time Harry found him. The classroom was empty except for Tom, who sat at one of the front desks reviewing notes in the dim amber light that came through the tall windows when the sun had already dropped low enough to withdraw its warmth but not yet its presence. Dust moved in the air with the lazy visibility of late dusk. The room itself felt paused, as though the day had stepped out of it for a moment and left only structure behind.
Harry stood in the doorway longer than he intended before speaking.
"You know," he said, "normal people don't spend this much time thinking about how everyone works."
Tom looked up. Not startled. Not annoyed. Merely attentive.
"Normal people," he said, "spend a great deal of time doing exactly that. They simply do it badly."
Harry shut the door behind him. The movement was more about keeping the conversation contained than anything dramatic, but once the latch clicked into place he became suddenly aware of how deliberate the action looked. Tom noticed that too, of course. He noticed everything.
"Why are you like this?" Harry asked.
Tom's expression did not change. "That is a child's question."
"You are a child."
"Technically."
Harry hated the answer on contact. He moved farther into the room, as if proximity might compensate for the way the conversation had already begun slipping into Tom's preferred shape.
"You talk about people like they're some kind of puzzle."
"They are."
"No," Harry said. "They're not."
Tom studied him for a moment. There was something almost curious in it, though not kind. More like an observer pausing over a result that matched expectation but still interested him in its particulars.
"Then why do you watch them so much?" he asked.
Harry went still.
Because that landed.
He did watch people. He watched Ron when embarrassment made him loud before it made him quiet. He watched Hermione when anger sharpened her into precision. He watched Neville when fear and effort were trying to occupy the same space inside him and neither quite knew where to stand. He had learned to watch because noticing things in time sometimes helped him stop them, and because sometimes the only way to protect people was to see the danger before it fully happened.
Tom saw the realization arrive. He spoke before Harry could answer.
"You object to my method," he said, "not the principle."
"That's not true."
"It is exactly true."
Harry's anger sharpened at once. "I don't do what you do."
"No," Tom agreed. "You do it reactively. Which is why it feels moral to you."
Harry's hands clenched. The urge to contradict came faster than language. "That's rubbish."
"Is it?"
"Yes."
Tom tilted his head slightly. "You notice weakness. Fear. Uncertainty. You move toward them when you think they matter. You make decisions about who needs help, when to intervene, what kind of pressure another person can tolerate before it breaks them. You simply insist that because your choices are compassionate, the structure beneath them must be different."
Harry stared at him, furious because too much of it sounded close enough to truth that his rejection came out tangled.
"That's not the same thing," he said.
"No," Tom replied. "It isn't. You care about outcome in a different moral vocabulary. But the act of observation itself does not become innocent merely because you approve of your reasons."
Harry felt heat rise in him so quickly it was almost disorienting. The worst part was not the accusation. It was the sense that Tom had taken something Harry believed about himself—something fundamentally decent—and rotated it just enough that it now resembled a mechanism rather than a virtue.
"You think," Harry said, forcing the words through his teeth, "that if you say things calmly enough they become true."
Tom closed the book in front of him.
"I think you are offended by accuracy when it implicates you."
For one hot instant Harry wanted to hit him.
The force of the impulse shocked him. It was not abstract. It was physical, immediate, and ugly in a way he had not anticipated. He had wanted to shout at Tom before. To walk away from him. To expose him somehow. But this was different. It was the sudden violent urge to stop the conversation not with words but with impact, as if Tom's precision could be interrupted by force where it could not be disrupted by argument.
Tom noticed that too.
Of course he did.
And then, to Harry's lasting disgust, something like sympathy touched his face. Not softness. Not pity. Something cooler and even more unbearable: recognition.
"That," Tom said quietly, "is exactly the sort of thing I mean."
Harry left before he said something worse.
He left so abruptly that the chair nearest the doorway scraped under his hand when he passed it, the sound harsher than anything else that had happened in the room. Out in the corridor, he stood breathing harder than he should have been, staring at stone as though it might steady the shape of his own thoughts.
He understood something new then, and hated it on contact.
Tom did not win conversations by lying.
He won them by taking one piece of the truth—just one—and arranging it so that resisting him felt like resisting reality itself. Harry did watch people. He did make judgments about when to intervene. He did act on what he observed. The moral difference between him and Tom was real, Harry still believed that with total force—but Tom had no interest in denying the difference. Instead he compressed it until it seemed smaller than the shared structure beneath it.
That was what made him so difficult to fight. He did not ask Harry to abandon morality. He asked him to recognize mechanism first and morality second. Once forced into that order, every objection felt belated.
By the time Harry reached Gryffindor Tower, his anger had settled into something uglier and harder to name. Hermione noticed it immediately. She was seated near the fire with a book open but one finger resting against the page in the absent way that meant she had been reading and thinking simultaneously.
"What happened?" she asked.
Harry sank into the chair opposite her. "I talked to him."
Hermione's eyes narrowed slightly. "And?"
Harry laughed once, without humor. "And apparently I'm morally reactive."
Ron, half-listening from nearby, made a face. "What does that even mean?"
Harry tried to explain. At first the words came badly—too fast, too frustrated, too tangled up in the residual heat of the conversation itself. Hermione stopped him twice, not to interrupt but to force sequence back into the account. Once he settled into it, once he reconstructed Tom's exact responses as best he could, the shape of the exchange became clearer even to him.
Hermione listened with full concentration.
When he finished, she sat very still for several moments.
"He's not just defending himself," she said at last.
"No," Harry replied. "He's doing something else."
"He's collapsing distinction."
Harry looked at her. "What?"
"He's taking a real similarity and using it to flatten the moral difference between you." Hermione's tone sharpened as she spoke, partly because the analytic clarity pleased her and partly because it horrified her. "Yes, of course you observe people. Yes, of course you make decisions based on what you notice. That doesn't make his use of those same capacities morally neutral. But if he can force you to defend the shared mechanism first, you lose the argument before you even reach intention."
Ron blinked. "That sounds exhausting."
"It is exhausting," Harry muttered.
Hermione closed the book in her lap. "He's making reflection feel like accusation."
That was exactly it.
Harry leaned back and looked toward the fire. "I don't know how you're supposed to argue with someone who does that."
Hermione did not answer immediately, and the fact that she did not answer frightened him more than if she had tried and failed out loud. Eventually she said, "You don't argue the surface. You separate the terms before he can compress them."
Harry let out a breath. "Brilliant. I'll just remember that while he's rearranging the conversation."
That earned the faintest hint of a smile from her, but it disappeared quickly.
Because underneath the irritation, both of them understood the same thing now: Tom's method was improving. He was no longer simply hard to pin down because he was secretive. He was hard to pin down because he had begun to weaponize conceptual accuracy itself.
That night, long after the common room quieted, Harry lay awake replaying the flash of violence he had felt in that classroom. He disliked not just the impulse but the proof it had offered Tom. Tom had been right to notice it. Right to fit it into his larger theory of people under pressure revealing themselves. Harry hated the idea that even his resistance could become material in Tom's framework.
That, perhaps more than anything else so far, gave him a new and colder understanding of what he was dealing with.
Tom did not simply want to influence people.
He wanted their resistance too.
Everything fed the system, provided it was observed carefully enough.