Birthdate: October 1
Age: 18
Gender: Male
Blood type: AB
Affiliation: Akatsuki
Previous affiliation(s): Otogakure
Team: Taka

Jugo's personality is usually quiet and unassuming, but, when angered, those around him stand little chance of survival. One time, he even became so angry that he devoured an entire village. This has caused a fearful village to label him as the "Scales", where anything could tip the balance. Cursing his existence, he took to secluding himself in caves, hoping to bring no-one any harm.This lasted until Kimimaro came to him, who was himself the last remnant of his own Kaguya clan.

Following Kimimaro, Jugo allowed himself to be one of Orochimaru's test subjects. Upon examination, Orochimaru was able to isolate enzymes in Jugo's blood that caused him to transform. By extracting these enzymes, Orochimaru was able to use them to produce similar, but more controlled, effects in other people, leading to the creation of the cursed seal. As time passed, Kimimaro died, then Orochimaru followed him, and Jugo shut himself away once more.