Ok... this granny is all kinds of sus. Not just that she is apparently an adventurers guild master, a high level semi-retired adventurer, but also starting to wonder if she is even a woman. I've only got circumstantial evidence for the gender switch, but something about the clothing just feels off.
Not that her being female or not makes much of a difference, she just gives me the vibes of an older Okama. But yeah, retired adventurer and guild master, in overly fancy clothing and heavy makeup sounds like it would tickle some mangaka's twisted Japanese sensibilities.