What makes up Kagrra,?

First you have Shin. He brings the Japanese aspect to Kagrra, with his Koto and Guitars.

Akiya offers an American sound to Kagrra, with their songs and a lot of his guitar solos.

Nao is the funnyman of Kagrra, playing the some wild notes of his Bass.

Izumi and his serious drumming gives Kagrra, character.

Isshi is the esophagus of it all. He gives Kagrra, speech. He ties everything together with his Japanese lyrics.

Put all of them into a room for a bit. Have them collaborate and you'll have a masterpiece, rest assured.