While we got lots of epic sized lore in Stormblood, we also got lots of development on a personal level, with lots of characters visiting their home town, and Alisaie continuing to be best character ever (make her the new poster girl!!!) Will we get to learn more personal things about our favorite NPCs? So far the most developed in this regard is Alphinaud, who we know to be a ladies man that could give Thancred a run for his money, who draws very well, a skill he took up to woo girls, can't swim, is affraid of ghosts, and is very fond of politics. And his sister.
Yugiri is especially lacking in this regard. She is all about her duties and her loyalties. It would be fun to learn that she's affraid of spiders or something.