@sweetcjat I watched the first episode and it took all of 2 minutes 19 seconds for Mari to act somewhat Juvia-ish. It only got worse(better) farther into the episode. Not to mention that the first villain she fought had ice and an umbrella.
As for connecting Nalu, I can only see it so far in Adrien's looks. His personality reminds me of someone else entirely (Drew from Pokémon). The only point that changed was when he wanted to charge into battle without a plan, I could see how that would be something like Natsu.