I’m not sure how many people know this but if you choose to do the Happy Mask Salesman’s sidequest in Ocarina of Time, you have the option of showing the first four masks to Zelda (and she makes a cute noise, like a laugh or a surprised sound)!
It might not seem like a big deal but I think it’s a cute aspect of the game. The fact that she’s one of the NPCs that they gave dialogue to for when Link wears a mask is actually kind of interesting. Because if you’ve played OoT, you know that you have to go through the courtyard undetected to speak to Zelda, and sometimes it can be really tedious.
This means that Link cares about Zelda so much that he’d risk sneaking past the guards– and possibly getting caught –in order to show her something as simple as a mask. There’s no way that he’s unaware of the chance of getting caught, and if you’ve ever been caught by a guard while playing the game, you know they treat him kind of bad and literally throw him out.
But he’s willing to risk it just so he can see her smile and hear her laugh. And if you think about it, he’s taking a break from collecting the Spiritual Stones– which he needs to save Hyrule– so he can do something that’ll brighten her day. He cares about her much more than you’d think.