Josette Y's homing shots do too much damage.... The whole game is a complete cakewalk with her homing shots covering the screen. You never have to go under any boss for any reason, since the spellcards die just as fast for Josette R (or negligably different time intervals). The stages are... They.... Well, they are. I wouldn't know what half the enemies shoot if I didn't play the other characters.
It's kind of funny because Josette Y's unfocused shot does about 60% the DPS of Josette R. The trouble with a homing type in PoSR is that most of my mooks typically have low health and come in large groups, so when they come onscreen one at a time Josette Y kills them before they can do anything. She's bad in situations where she gets mobbed, though. I suppose I need to think of what I can do about this. I'll probably load most of the damage into the yellow arrows and limit their trajectory.
Kotohime is lol hard on both modes, but I like it like that. Others mightn't though. Particularly her first spellcard, Blast Sign "Omnidirectional Bombing", where she approaches really high y-coordinates, considering what she's shooting and the velocity that the shrapnel expands.
I guess I didn't make it obvious enough, but in the second wave of Omnidirectional Bombing you're supposed to get in Kotohime's face and go to the center so you don't have the bombs explode right next to you. I'll try to think of an adjustment.
No Lunatic mode yet.... Hnnngggh.
Probably not until beta 6 since it'll need a lot of special attention...however it looks like a beta 5.5 will probably be necessary so I'll probably put Easy mode in there. You like Easy mode, right Naut? :V
Yeah, I'm going to agree that Kotohime caught me off guard, especially the slight curve to her non-spell bullets, which makes it near impossible for me to predict their trajectory until I'm already (failing at) dodging them. And a few of her spellcards seemed to lack any real strategy aside from "get the hell away from the bombs and hope you don't get screwed over by the other crap she's shooting". However, I think that her attack style in general does support her status as a maniacal princess (kaguya who?).
During playtesting I generally settled on the following strategies (I use Josette B for testing purposes usually since she's the worst against bosses):
Omnidirectional Bombing: See above
Bomb Threat: Go to side, stream shots to keep them on that side, run to other side when bomb is about to explode. Usually need to cut across the blue arrows.
White Elephant: Don't spend too much time under Kotohime, go to the side to draw out the bubble stream and clear some room, then slowly pass her and shoot her up as you make your way to the other side.
Black Lotus: Stay low to let the black shots straighten out before they get to you. Easier to judge where they're going. Don't try to dodge everything from the exact center.
Bombing Run: Watch the flashing bombs to estimate where they'll explode, adjust movement accordingly.
Magic Pendant: lol
Oh yeah, stage five rapes my framerate 
So it's slowing you down too, huh. Might need to cut back on the trees.
