Sea A

Fans of the Anime Festival Asia may recognize some of these ladies but what are they all doing dressed up like that together?
They be a new idol unit called "Sea A" and will be making their debut in Japan with their first single called "Dream Shooter" that will be the ending theme of the anime title Vanguard released by Lantis.
See them in action below.

And here are the ladies in alphabetical order.

DOB: 1991/01/29
Blood Type: O
Zodiac Sign: Aquarius
Birth Place: Singapore
Favorite Food: Mum’s home cooked food, Steamboat, Teppan Yaki, Sushi, Ramen
Favorite Anime: Mobile Suit Gundam SEED DESTINY, KImi ni Todoke, LOVELY★COMPLEX, Hakuoki
Places I want to go in Japan: Akihabara, Shibuya, Harajyuku

DOB: 1992/12/01
Blood Type: B
Zodiac Sign: Sagittarius
Birth Place: Singapore
Favorite Food: Pasta, Chicken Rice, Sashimi, Unagi, Shishamo, Chawan-mushi
Favorite Anime: Card Capture Sakura, Chobits, Angelic Layer, Magical Knight Rayearth, Mobile Suite Gundam SEED DESTINY, NARUTO – Shippu Den Kizuna, Kaicho wa Maid sama (loves CLAMP works!)
Places I want to go in Japan: Akihabara

DOB: 1991/02/14
Blood Type: O
Zodiac Sign: Aquarius
Birth Place: Singapore
Favorite Food: Mother’s homemade pasta, Curry Rice
Favorite Anime: TORA DORA!, Kaicho wa Maid Sama, Kurage Hime
Places I want to go in Japan: Akihabara

DOB: 1989/07/10
Blood Type: ?
Zodiac Sign: Cancer
Birth Place: Malaysia
Favorite Food: Roti Pisang, Teh tarik, Sashimi, Chawan-mushi
Favorite Anime: ONEPIECE, NARUTO, K-ON!, My little sister cannot be this cute, Kaicho wa Maid Sama, Please!! Teacher, Please!! Sister, Chobits
Places I want to go in Japan: Akihabara