the whole "Hagumi vs Rin" thing is hilarious to me because you are all fools. Hagumi & Rin are FRIENDS and when they first met and realised how similar they are they bonded over that and now it's a running joke. sometimes they switch places to see if the others notice. Hagumi taught Rin all about softball and the bass while Rin made Hagumi an official member of the Protect Pana Squad. and whenever they meet up Hagumi makes sure to have croquettes to give her because she loves them. also Hagumi played the bass in all of Rin's solo songs and centers that had one. they would never fight except in sports