Pushing different buttons allow different hairstyles for Kasumi when selecting her (Most of her costumes that is):
Y button: Low ponytail
X button: High ponytail
A button: Loose hair
White button: Braid Hair
Start Button: Loose Hair

• Costume changes for Kasumi’s Costume 4:
  Y button: White panties; Low ponytail
  X button: Blue Panties; High ponytail
  A button: White Panties; Loose hair
  White button: Plaid Blue Panties; Braid Hair
  Start Button: White Panties; Loose Hair
• Costume changes for Kasumi’s Costume 5:
  Y button: Pale Yellow panties; Low ponytail
  X button: Pink Panties; High ponytail
  A button: Pink (spotted with strawberries I assume) Panties;
• Loose hair:
  White button: EXTREMELY Pink/Purple panties; Braid Hair
  Start Button: Pink Panties; Loose Hair
• Costume changes for Kasumi’s Costume 11:
  Y button: Plain White Panties; Low ponytail
  X button: Furry Animal on Back of Panties; High ponytail
  A button: Plain White Panties; Loose hair
  White button: Blue panties; Braid Hair
  Start Button: Plain White Panties; Loose Hair
• Costume changes for Kasumi’s Costume 14:
  Y button: Plain White Panties; Low ponytail
  X button: Pink Panties; High ponytail
  A button: Plain White Panties; Loose hair
  White button: Yellow panties; Braid Hair
  Start Button: Plain White Panties; Loose Hair