Katie is princess of the Indian Ocean. She becomes good friends with Jamie when she calms down her bossiness. She will debut in episode 8.
Katie is nice, and tends to blush. For some reason, she falls in love with any boy except for ones with red hair. She also loves to dress up.
Katie has red hair and red eyes. She has a taste for fashion, so she doesn't have any regular clothing.
In her mermaid form, Katie's hair, eyes, bra and tail are all orange.
In her idol form, Katie's hair is red, and her boots, gloves and outfit are all orange.
Katie's voice, with no doubt, has a Spanish accent. However, when singing, she loses the accent and has a voice sounding like Mizore Shirayuki from Rosario + Vampire.
- Say Yes (English version; by Rie Kugimiya)
- Nagisa no deka melon (English version; by Misato Fukuen; trio with Stacy and Jamie)
- Akai Jounestu (English version; by Nana Mizuki; duet with Jamie)
- Black Diamond (English version; by Nana Mizuki; duet with Sunny)
- Hitori de Itemo (English version; by Kumi Sakuma; with Courtney, Iris, Isabella, Stacy and Mary Anne)
Voice Actor (Japanese): Rie Kugimiya
Voice Actor (English): Tia Ballard
"TANGERINE PEARL VOICE!"
"You idiot! You're making it wet!"