In Mountain of Faith, midboss Hina explodes if you deplete her lifebar, but runs away if you timeout the spellcard.
Midboss Nitori remains on screen and has few dialogue lines if you deplete her healthbar, but runs away and doesn’t have any dialogue if you timeout the spellcard.
Momiji flies away as a crow if you deplete her healthbar, but if you timeout the attack she will fly away in her regular form. Also, around 4 seconds left on the timer, stage enemies start appearing on screen, similarly to Shizuha’s nonspell on Easy and Normal.
Midboss Sanae will simply fly away regardless if you deplete her lifebar or timeout the spellcard and midboss Kanako will instead explode in both situations.
Please check /post/723580420284923904/ for details about Shizuha’s attacks.