Also known as: 北城睦実, 623, サブロー先輩, サブロー, 326
Keroro Gunsou character; called Saburo Mutsumi in the anime adaption.
He has short Grey Hair and Blue Eyes. He is usually depicted in the Kissho Academy School Uniform, and often wears a yellow Beanie.
Official art
Trivia
- "Mutsumi" can be read as "623". He uses this string of numbers as his moniker for the radio show he hosts and DJs.
- In the manga, this alias is "326".
- He is often seen with Kururu (Keroro Gunsou), the only character to know his secret DJ identity.
- He is voiced by Ishida Akira (Voice Actor).