Yeah I took it as a little silly crush thing like a lot of kids have. I can't even count the number of 5,6,7 year olds who had a crush on someone much older like a babysitter or a teacher. Kids at that age are still learning about that stuff so their emotions can get a bit confused sometimes

She can be annoying, sure, but I overall like the character and I wouldn't say her crush on Zidane is one of her bad qualities. She even seems to know deep down that its silly considering how often she encourages Garnet and Zidane together