Final thoughts
Clarissa and Labyrinthia finished in a virtual tie for first, far ahead of everyone else. Clarissa of course is the narrative main character, while Labyrinthia delivers the battle reports, which constitute around half of her line total (meaning that even without them, she'd still be #2).
Felius generally talks relatively little but opens up when he feels it's important (e.g. when discussing Weisheit or Elw Borea), which makes sense given his characterization. Despite finishing just behind Levin there's rather little doubt in my mind he's the game's male lead. He, Levin, and Ragnar are all reasonably close at a bit under 500 lines.
Alexia did in fact end up finishing in #6, resulting in a clean sweep for the PCs, though it was a close fight! Her sister Katrina has a major charge towards the end and finishes in the same general area as the other major villains: Edna, Weisheit, Rupert, and Charlton. As I remarked earlier, it's interesting that Charlton, the primary direct antagonist for most of the game, is actually the least chatty of the bunch. Meanwhile, Edna was right after all: the star of this [NPC] show is her!! (Barely.)
After a large drop you get the parent figures: Hrathnir, Melissa, and Eisen. Melissa manages an impressive total for someone who is dead at the start of the game. Secondary antagonists Chelle and the Tormenta Triad are next, with Ellen in the mix, a character who is kinda important for a few early chapters then is dropped after 1-5.
Female characters account for 3739* of the game's 7074 lines, or about 53%. A number of people predicted that they'd have the majority, and they were correct, but it is actually quite close! While Clarissa and Labyrinthia being the top two is a big deal (they each have roughly a third of the female lines), the NPC cast skewing very male keeps things competitive. I would think that an overwhelming majority of RPG stories have majority-male dialog, since XF's NPC cast feels quite typical in this regard, and few other games have such a clear female top two.
*Weisheit is counted as male for this figure, regardless of body.