^ Obviously because Jashin-chan doesn't treat Medusa as a friend (or girlfriend), but as an ATM to take advantage of her kindness. Though there are times when she feels quite comfortable around her, rarely.
Oh, for what it's worth on the blonde front, a Daily Theatre episode had Rina luring Eli off on a date to a candy store with promises of chocolate: http://sifasdt.waxwolf.com/?date=2021-05-18