Sugaku Okami

Sugaku Okami (古神数学,Ōkami Sugaku) is a Tokubetsu Jōnin-level Shinobi of Takigakure and a Pseudo-Jinchūriki of Son Gokū, the Four-Tails.

Background
Sugaku was born in Takigakure to Seibutsu Okami, the Head of the Okami Clan, and his wife, Kyōiku. He was ostracized by the rest of his clan because he was born without their Kekkei Genkai, Lava Release. However, by the time he was 4 years old, he was very emotionally depressed and cold, as he was bullied by other kids in his clan.

Coincidentally, around the same time, Shujinko Kamizuru, the then-Jinchūriki of the Four-Tails, had traveled to Takigakure. Sugaku's father, unable to watch Sugaku suffer more, extracted some of the Four-Tails' chakra from Shujinko and injected it into Sugaku. This not only gave Sugaku Lava Release, but the ability to access the Four-Tails Chakra in times of need.