You are a good person, that's why bad things happen to you.

Perhaps this was Tadashi Yamaguchi's definition. Such a pure and innocent person, and for that reason, you had to suffer at the hands of others... People abused Yamaguchi, making him do his homework, saying horrible things behind his back, and that when they didn't say it to his face from him.

Luckily for the greenish one, he had Tsukishima, and he had you. The boy really wouldn't know what he would do without you two. He lost count of how many times you broke him by doing activities for him, or defending him from these bad-natured people. Maybe this would affect Tadashi negatively in other aspects. Bullying, mockery, all of this made Tadashi's performance and joy plummet. He began to feel more insufficient than he already was, and when he couldn't cast simple spells it was the last straw. The words were really starting to affect Tadashi and it was in the worst way possible... And look, the boy's despair increased by a hundred percent when he discovered the return of the dark lord: Lord Voldemort.

In fact, it took a bit for the greenish one to believe, since Tsukishima got it into his head that it was bullshit, but you, being on Harry's side the whole time, automatically convinced them otherwise. The problem was that Tadashi could barely cast a simple spell, how the hell would he escape this situation?

And that's when you arrived, being the light at the end of Yamaguchi's tunnel once again. After another lesson from Harry on defense against the dark arts, Yamaguchi had thousands of failed attempts to perform the "Expecto Patronum", so he ended up staying late in the room to try to cast the spell. It turns out that you noticed, and went back into the room to check on Yamaguchi, and when you entered, you saw him with an exhausted and tired expression.

"Damn... I have to get it right..."

He exhaled, squeezing the wand handle tightly, still not realizing its presence.