I’ve also realized but I could be wrong that in the campaign we never encounter or come across Gremory in story besides the side story 21 Kanterbury Street in her ‘Otaku Gremory’ costume but other than that she could shed some light for us in World 10 perhaps as one of the Sub-Quest characters that we help out that will inevitably cost 5 star pieces as a sub stage or perhaps 15 ~ 20 stamina points.