When Harry witnesses Draco being forced to torture Rowle, he is extremely upset. Much more so than he typically is about these visions. There are a lot of very drarry implications. Let's break it down.
"Malfoy’s gaunt, petrified face seemed branded on the inside of his eyes. Harry felt sickened by what he had seen, by the use to which Draco was now being put by Voldemort.”
Notable points from this passage:
1) Harry understands Draco so well that he immediately takes for granted that he doesn't want to be using the Cruciatus curse. It never even crosses his mind to take this as evidence that Draco is now a willing torturer who enjoys cruelty or that he deserves to be in this situation for having chosen the wrong side and for his role in Dumbledore's death.
Nor does Harry think Draco is just scared and upset because he's afraid Voldemort might lash out at him too - which is what Harry would think if he saw any other Death Eater acting afraid around Voldemort. He clearly sees that Draco is horrified by the acts he is being forced to commit. And he also completely accepts that it is Voldemort forcing Draco to commit these acts, thus absolving Draco of responsibility.
2) Harry is DEEPLY upset by seeing Draco in this position. More upset than he ever is about seeing any other Death Eater being terrorized or hurt by Voldemort (Harry doesn't even spare one thought for Rowle for example!) Not only that. He's also more upset than he is about seeing Ollivander tortured. Or about seeing Voldemort murder a woman and her children later on while searching for information about Gregorovitch. He finds those visions alarming but he shakes them off pretty quickly.
The only comparable strong reactions are how he responds to his visions of Arthur Weasley and Sirius in book 5 - i.e. visions of people he knows and cares about in danger and suffering. And it's not even the scene as a whole that upsets him. It's specifically Draco - whose frightened face seems "branded" on the inside of Harry's eyes. Harry can't get the vision out of his head, feels sickened, and fights to keep his voice casual afterward. Even though Draco wasn't even actively being hurt.
So canonically Draco matters to Harry in a way that almost all other people don't. It's not generic nobility that gives Harry sympathy even for an enemy - because he doesn't feel this way about other Death Eaters. And it's not general pity that Harry would feel for any innocent hurt by Voldemort - because he doesn't feel that way about victims like Ollivander or the children Voldemort killed. It's the type of reaction Harry ONLY has to people he deeply cares about suffering or being in danger. Harry may not think of it that way on an intellectual level. But his heart knows it even if his brain doesn't. He cares about Draco Malfoy. A lot. He cares about him more than he cares about almost anyone else.
3) Also notable. Harry starts out referring to him as Malfoy but then switches to thinking of him as Draco as he starts worrying about him. (Yes. The drarry trope of Harry switching from "Malfoy" to "Draco" literally happens. IN CANON.) And he keeps thinking of him as Draco after that point. The next time Draco is referred to is during the whole sequence where the Golden Trio are prisoners at the Manor. Harry refers to Lucius by his full name multiple times, but consistently refers to Draco as "Draco" rather than "Malfoy" in his internal narration.
4) (Also the fact that Draco's face is described as "gaunt" hits me right in the feels. It seems that he's in worse shape even than he was when Harry last saw him at the end of 6th year. Sad but not surprising given the guilt that is probably eating at him over his role in Dumbledore's death, what he is now being forced to do as a Death Eater, and the very tangible dangers and suffering that come with being out of favor with Voldemort while having him in your house.)
Tldr: I don't need my ships to be canon but drarry is. jkr who? ;)














