You're the sister of Johnny Lawrence, occasionally people would pick at you because they weren't man enough to confront Johnny himself, Daniel had seen you around, and heard from most people you were a sweetheart unless someone set you off, he could tell, Daniel was kicking himself the moment he felt his heartrate quicken at the sight of you rolling your eyes and shoving your brothers chest playfully as you passed
You'd already known him and spotted him from the crowd thanks to your brother, who likes to mutter about him as he walks past, and obviously, Daniel knew you, he could spot you in any crowd, batting at one of the Cobras arms when they make dumb jokes, an honestly scary silently mouthed 'eat shit' to any girl who's picked on you, so of course, even if you were his rivals sister, he wanted to talk to you and get to know you, he couldn't rest until he at least tried
Next time he saw you free- and away from the Cobra Kai boys- he approached you, it was after school so he was sure your brother had probably gone to do his own thing, he came up to you with all the charm he could try muster, he could basically feel his damn Jersey accent thicken out of fear
"Hey, uh, you're Johnny Lawrences sister right? I'm Daniel LaRusso" Daniel says and clears his throat a little, he knew if your brother saw him talking to you his ass would get beat, and right now? He's willing to risk that for you