Frankie Emily Weasley

What if instead of twins they were triplets Frankie is 1/3 of the infamous Weasley triples only because she's a girl she has a harder time with it then Fred and George follow the triplets as they go through their last year at Hogwarts and deal with family drama potion masters and pranks MentorSnape/Frankie Angelina/George Katie/Fred and later Lee/Frankie