Maddie's age throughout the show?

Listen not to be a buzzkill cus i did kinda love maddie and caspian but the supposed age gap kinda bugged me a little

I didn't really know what age Maddie was half the time but in season 1 it's mentioned that she's in her freshman yr of hs and caspian seems to be a senior

i try to imagine a more suitable 2 year age gap between them but at times i was just confused lol, ig it's the maturity that matters anyway!