Hidden Costume Key:
N=Normal Difficulty
UPS=User Personal Stats
S=Survival Mode
SM=Story Mode

Ayane:
Shinobi(Purple):Clear SM,UPS victory x1,UPS Play x5.
Blazer:Clear SM on N without continuing, Clear SM x5, UPS victory x5,UPS
play x10.
Winter Cloth: Get 1500000 points in S on N, Use more than 25 times, UPS
victory x12, UPS play x22.
Mikenia: Clear over 50 stages in S, Use more than 50 times,UPS victory
x25, UPS play x45.
Private Black and White: Clear Time Attack in less than 4'15" with
official rule on N, Use more than 100 times,UPS victory x50 UPS x 90.
Dark Heroine: Get Tiara item in S, Use more than 200 times, Pedometer
over 20,000, UPS play x 180.
More to come soon!