Kaito

カイト

KAITO is the second Japanese Vocaloid released, developed by YAMAHA and distributed by Crypton Future Media alongside MEIKO. His voice is provided by the well-known Japanese singer Naoto Fūga. He and MEIKO are frequently called "Nenchou-gumi" (The Seniors).
Fans typically mark his anniversary from February 14th to 17th because YAMAHA and Crypton printed conflicting release dates.
He is commonly depicted as a kind "older brother" figure in various media, although his age and numerous other details remain open to interpretation.
Alternative names/personalities:
Aku no Musume: Kyle Marlon (カイル=マーロン) / King of the Blue Kingdom (マーロン国（青ノ国）の国王)
Akujiki Musume Conchita: Carlos Marlon (カルロス=マーロン)
Cantarella: Cesare (チェーザレ)
Shuujin to Kamihikouki: Kaimural Flag (カイムラル・フラグ)
Venomania-kou no Kyouki: Kachess Crim (カーチェス・クリム)

Details:

First name:: Kaito
Other names:: Kaito Shion
Kyle Marlon
King of the Blue Kingdom
Carlos Marlon
Kachess Crim
Kaimural Flag
Ce
Birthday:: February 17th
Height:: Unknown (Around 175 cm (5'9" ft) in Project SEKAI)