Let’s talk about the battle in the Department of Mysteries for a sec. So after the group gets split up, Harry, Hermione and Neville go one way and Ron, Ginny and Luna the other. The next time we see the latter group Ginny’s ankle is busted and Ron’s brain is addled. Luna says that the Death Eaters blew up a planet in the planetarium and hit Ron with some sort of hex.
Let’s take a moment to examine that. If the curse that hit the planet had hit any of the kids, they’d be dead. So the Death Eater probably missed, hit the planet ahead of them, injuring Ginny. But here’s the important part: the one who actually gets hit by the hex? Ron.
Why is this important? Because Ron is consistently described throughout the series as tall. Like, every time Harry sees him after the beginning of summer he’s described as having shot up. Again. On the other hand Ginny is described as “the small one” by Bellatrix Lestrange. But Ron is behind her. I don’t know if you know this but tall people can run really fast. I am not particularly fit but I am tall. And I can pour on the speed when my adrenaline’s up, which I have no doubt was the case for everyone in the Department of Mysteries. But he’s behind her.
Because he did that deliberately. He kept his body between the Death Eaters and the girls. He shielded them from their spells. Because those he cares about are more important to him than his own life.
I don’t know, I just think about this a lot.