Um Yookie, Hijiri can be found in the Myouren temple grass also she's less common there too.
Also... THIS FLANDRE RUNNING AROUND CRAP IS MAKING MY HEAD SPIN. >____< I'm trying to grind to knock Remilia down just uuuuuuuuugh Flandre stop running around I already lost 100lbs running around in the mansion.
Current Party: Assist Eirin, Speed Tojiko, Speed Miko, Speed Futo, Power Reisen, and Power Rika.
Speedy Taoists for the win <3
Edit: SO HAPPY Speed Miko survived Remilia's Power Mini version of herself and one-shotted her YES TAKE THAT REMILIA, also she is the Name changing npc after you beat her.
Edit 2: Now to wonder where the heck do I go after beating Remilia and encountering Aya any information would be helpful.