@gameofyou1 @Late To the Beard Party Thanks for the encouragement! [...]
Next up, I ran into what appears to be an impassable hard lock issue this time.
After defeating the boss at the end of "Haribote Dungeon" and the game transitions from the battle screen back to the mansion, you can hear Lemia's (or maybe Ruby's?) voice chastising you. However, only the dialog background box itself is visible with no Portrait (if there's meant to be one at this point) or dialog text, and no "press button to progress" indicator arrow. No response to any button inputs, forcing a reset of the game. (Will be a rough one to test if fixed as that boss fight was a slog, maybe I should grind some more levels and money in the mean time!)
As a minor, separate note: the enemy "Nemrin" (Ghostly Girl apparition enemy in the same dungeon) does have at least a couple attack animations (ポカ and チュ) with onomatopoeia Katakana next to their character sprite when used. Not sure if it's worth messing with, but just thought I'd mention it!