It could be that Harry has noticed some strange behavior from Malfoy. For instance, Malfoy might be acting secretively around certain areas of Hogwarts. Harry's squinting is his way of observing Malfoy closely to find out what he's hiding.
It might also indicate a newfound curiosity. Fanfiction often takes characters in different directions. Harry could be squinting at Malfoy because he's starting to see a different side of him. Maybe he's noticed something that makes him think Malfoy isn't all bad, and the squint is his way of trying to understand this new Malfoy better.
Another theme is rivalry - turned - friendship. The act of Harry squinting at Malfoy can be seen as a precursor to a change in their relationship. As the story unfolds, they might start to understand each other better and form an unexpected bond. For example, in some fanfictions, they team up against a common enemy after Harry realizes that Malfoy isn't as bad as he initially thought. This is often a very heartwarming theme.
It could be a sign of distrust. Harry has always been suspicious of Malfoy's actions and motives, so the squinting might be his way of trying to figure out what Malfoy is up to.
There's also 'Squinting at the Rival' which delves into how Harry's constant squinting at Malfoy might be a sign of his underlying curiosity about Malfoy's true motives and actions. This fanfic has some great character development and a really interesting plot that keeps you hooked.
One interesting fanfiction could be 'The Unspoken Glances' where Harry's squinting at Malfoy is a sign of his growing suspicion about Malfoy's secret activities. It delves into their complex relationship and how their interactions change over time.
One possibility is that Harry's squinting eventually leads to a confrontation. He might directly question Malfoy about his actions, which could either end in a fight or a reluctant alliance if they find out they have a common enemy.
In many fanfictions, Harry Potter squinting at Voldemort could be a sign of intense focus. It might be that Harry is trying to read Voldemort's next move, or perhaps he's looking for some sign of weakness. For example, in some stories, Harry's squinting could be related to his newfound magical abilities that he's using to analyze Voldemort's magic signature.
One possible fanfiction could be that Harry Potter is kidnapped by a dark wizard who has some strange power that makes Harry squint. Maybe this wizard is trying to use Harry's unique connection to Voldemort for some dark ritual. Harry has to use his wits and the few spells he can manage while squinting to try and escape.
It could mean a fan - made story (fanfiction) where Harry Potter is looking closely or suspiciously at a snake. Maybe in this fanfiction, the snake has some special significance, like being related to Slytherin or having some kind of magical power that Harry is trying to figure out by squinting at it.