Well, this person is just a side character, so it's fine if i just put her out her. Sugar (Original name Jennifer Meiker) is the owner and only worker of a small confectionery store/pseudo-cafe called Totally Sweet. It has always been her passion to diverge from the family baking business and do specifically confectioneries, to the point where she went to college for finance and culinary and got her first name legally changed to Sugar. But, since that craft is rather niche and even then dying, she gets next to no customers, making even her greatest passion mundane. So, she's become apathetic, just waiting for at least enough customers to make ends meet. But, when Mois and Jett find out about the place and have the guild meet up there frequently, she actually becomes really nice friends with all of them, even to the point of providing advice to any of them when they ask for it. Well, she does, but she also sometimes tries to subtly create setups for specific people just so she can watch them interact on her way home from work. When she's called out on it, she's just like "What? I'm always bored here, might as well stir up some interest in my life."
In my opinion, the ironically negative candy store owner was not a mistake.