Nah, we know Crest better than Nessy. We've met his mom and know a decent amount of his history beyond just his personality. Sure we know Suspira's personality, but she's just stands out more as a louder character than the more sullen Crest. The only thing we know about her history is a quick tale in the intermission about browing up in a restraunt as a shy girl, breaking her seals and getting recruited by the Phalanx, together with her relationship with Kin.
Crest has made progress with his confidence around women and begun a process of finding his place in life by restarting his swordsmanship training under Bern, leaving home and going on this journey of, not so much self-discovery but probably more like independence and just generally experiencing the world.
...We can probably presume he's been getting more sword training by Bern off-screen between stories (Solstice to Brahma, Danzig's to Eschelon and waiting for Maytag to be healed in Eschelon). It'd only be 1-3 hours a day and I think he started his training on comic day 4, so about three weeks of training.