apron Cirno
WHAT. *coffee spit*
As mentioned in the little known bugs thread, level 1+ of Patchy's default 236 fireball's fire trails deal damage, albeit, not that much.
In Ten Desires, each characters' trance shot resembles a previous shot type or bomb they had, with the exception of Youmu, who's slashes are similar to her level one charge from PoFV.
Speaking of Ten Desires, Kyoko's power is to reflect soundwaves, but with the way it looks in game, it feels more like she has the power to manipulate borders.
Again, with the exception of Youmu (and this one is possibly wrong, since I can't read Japanese), the girls' bombs in TD are all spellcards they had in Hisoutensoku. Or, unless I'm wrong and Sanae isn't using Forbidden Ritual.
Alice has her own shot underneath Shanghai's laser in IN. Not sure if this was already mentioned.