Serkis

He was a demonic, maniacal spirit who sought to wreak havoc on those who wronged him. He fooled the unconscious Sekhmet within her subconsicous into believing that he could help her get her freedom back from the Hidden Leaf higher-ups, and then possessed her body in an attempt to avenge himself on Naruto Uzumaki and Sasuke Uchiha for sealing him away into another dimension.

Physical Appearance
Serkis had no definite physical form. He mainly appeared as a red blob-like cloud of gas with a single large red eye.

Before Sekhmet's Arrival to the Leaf
Long before Sekhmet's arrival to the Hidden Leaf Village, he was sealed away by Naruto and Sasuke when he tried to possess multiple people in the village. During the time he was sealed, Serkis sensed Sekhmet's emotional imbalance and started breaking the seal little by little in the hopes that he could use her to get rid of Naruto and Sasuke.

More coming soon.

Skills and Abilities
Coming soon.