Ten Tailed Wolf

The Ten-Tailed Wolf is yet another Biiju that roamed the lands as well as the other tailed beasts, but was captured and contained before its actions were ever spread through out of history. The Fuesaan clan captured and conceiled it's information from the rest of the world. Because of this, in the Naruto Realm the Akatsuki never knew about it; thus, never persued Chiisa. As a baby, Valchior Fuesaan, (Chiisa's Father) Chose his own son to seal the extremely powerful demon within. He would have sealed the creature within himself, but he felt that he was too weak to contain the beast. Using an extremely powerful bonding seal (A variation of the The Eight Trigrams Seal that Naruto possesses to keep the Nine Tailed Fox at bay.) Which locked the powerful demon tightly inside his new born baby son's body.

Unlike Naruto, Chiisa wasn't able to be directly influenced by the creature within him (I.E. Unwanted Mental Communication or Posession). Later his sister Yuki Lee (Fuesaan) Actually tampered with the seal (not mentioned in the book) during the training she was administered him, in order for the beast to be controlled. Even though the Ten-Tailed Wolf is 2x stronger than it's cousin the Nine Tails, due to the intense seal, it's power and influence never had the chance to be channeled into Chiisa. The only time where the creature's powers influenced him is with; His natural hearing and sense of smell, and while activating his blood line trait, instead of having one tail in his wolf form he harbors 1-10 tails (Similar to the Nine Tail stages).

Until Yuki actually informed Chiisa about the beast within him, he was completely ignorant to the fact. (This was actually Valchior's Intention. He felt the less his son knew about what lives within him, the less worry he'd have in his life)

Personality wise, the Ten-Tailed fox is a rather smart and collected creature. He does not harbor any hatred for his host (unlike the Nine Tails) In fact, he only Despises the person who sealed him in the first place. Ten-Tails would do anything in his power to strike revenge against Valchior, and since he's deceased he feels the way of exacting revenge is to completely cut himself off from his Host. Meaning not even bothering to even bestow a single length of power for him. The only way Chiisa was able to Fully access the power that the Ten-Tailed Wolf possesed was when he was succumed to the influence of Madness in the Soul Eater realm in the catostrophic duel with his friend Anta.