She had a carrot-and-stick approach to fucking with gullible little me. She'd do things like tell me sitting on bicycle seats would slowly neuter me (I rode mostly in a standing position for YEARS after that), and pulling porn from my folders into the desktop and renaming the files some variants of "not enough dicks". Anything to make me uncomfortable while she giggled in the background, basically. And if I got mad enough, she always did this conciliatory "aww come on bro" thing to make me feel stupid for not brushing off whatever she just did.
But then she taught me proper PC security and ways to bypass our parents internet filter (there wasn't always a lesson in her pranks, but still). She was just constantly teaching and introducing things to me. Like those Chinese comics and how to read them, 4chan WAY before I had any business browsing it, and even this fucking horse show. A large part of my music taste is from her recommendations, a bunch of video games, and the list just goes on and on.
Despite the shit, it was really hard not to idolize her. She was never the touchy feely type, so any hint of praise would stir the butterflies in my stomach. If she thanked me for something or outright said I did good, I'd literally be hugging the covers in my bed that night. Of course she picked up on all of this and played me like a damn fiddle. Thoroughly, considering how much I miss having her around to this day. I never actually crossed the sexual interest event horizon towards her, but the kid-crush was real.
tl;dr: I was the Scootaloo to her Rainbow Dash.