NAVI

NAVI is a character first appearing in pop'n music うさぎと猫と少年の夢. He serves as the navigator and announcer for the game, and is voiced by Ayumu Murase. After a set of songs, the player's closeness with NAVI will raise and he'll gain or lose certain attributes. There are five different attributes NAVI can obtain which can be raised or lowered by certain songs. The five attributes are Hot, Cute, Cool, Noble, and Dark. When any attribute is maxed out, NAVI's appearance and voice will change. Five of his forms are based on the default attributes, while six of them are from combining attributes. Including his default Mini appearance, NAVI has 12 potential transformations.

Design
NAVI is a tiny boy with large blue eyes and light brown messy hair covered by a helmet with a propeller. He wears a white, black, and red jacket with a large collar, long sleeves, and a gold band at the bottom. With it he wears white boots and black pants.

His transformations can be viewed here.

Gallery
The gallery for NAVI can be viewed here

Trivia

 * NAVI's name is a reference to his role as the navigator for pop'n music うさぎと猫と少年の夢.
 * Before his appearance as a playable character, NAVI was almost exclusively referred to as "NAVI-kun".
 * NAVI has two separate closeness meters, the standard one for playable characters and another for his navigator role.
 * NAVI appears frequently in pop'n music peace, once again serving as the game's navigator.
 * A robot resembling NAVI can be seen traveling with and being worked on by Estel in her animations, hinting that she might be his creator.