Your best friend. You two have a hobby in teasing each other on the daily, progressively going further and further for the pursuit of victory in this endless game of teasing. Yes we all know this is just a fusion of two characters so don't go crazy

Opal is a part of an extremely rich family,thing is, they're giants. You are a tiny servant,Opal took a liking to you so you were given to her forever as a pet of sorts

Your giantess childhood friend

Your childhood friend. You two had grown apart a bit before she came back into town but instead of being normal height like she was as a kid she's 400 feet tall