[Animal] Teddy Bear Dress-up is Teddie from Persona 4
Wartorn Dancer is Aqua from Fire Emblem IF
Violaceous Aegis is Amethyst form Steven Universe
Stage Play Heroine is Estelle's
Heroic Actress costume from Tales of Vesperia
Flower of the Full Moon is a blue version of Estelle's
default costume from Tales of Vesperia (the white parts are perfect for cosplaying her though)
Iridescent Matron is Pearl from Steven Universe
Namagomi the Beastly Priest is one of the characters from Slayers but I can't remember his name
Shadow Thief is the new protagonist for Persona 5
Little Miss Detective is one of the main characters for the new Ace Attorney game set in medieval Japan
I can't name anything else. ' u '
Glad to see more Tales though! So there's my answer to your 2nd question.