Sergeant Keroro: The Super Duper Movie 2

超劇場版　ケロロ軍曹２　深海のプリンセスであります！

The story

During a vacation Natsumi is visited by a female alien and male alien who she later gains feelings for from the ocean that makes her the Deep Sea Princess who, along with the rest of the Keroro Platoon, encounter many dangers summoned by a mysterious creature. (Source: Wikipedia)

Meet the characters

KeroroMAIN

GiroroMAIN

TamamaMAIN

KururuMAIN

DororoMAIN

Fuyuki HinataMAIN

Natsumi HinataMAIN

MeruMAIN