Firmament Sky

Firmament Sky (天空のスカイ, Tenkū no Sukai) was a ninja from the Ninja Village. He was from the 27th graduating class like Multicolored Rainbow, and a member of the Heavenly Ninja Party.

Abilities and Powers
As a graduate of the Ninja Village and a member of the Heavenly Ninja Party, Firmament Sky is a very powerful ninja. He, along with several other ninja, were able to easily overpower Sonic's Shadow Burial clones. However, he was ultimately killed during the battle.

Physical Abilities
Immense Strength: As a graduate of The Village, it's safe to assume that he has very impressive physical strength.

Immense Speed and Reflexes: Firmament Sky has very impressive speed, being able to keep up with Sonic and effortlessly overpower Sonic's Shadow clones. He was also able to trade blows with Flashy Flash before being killed later on.

Equipment
Swords: Firmament Sky appears to have multiple swords, as Sonic was able to take two of his swords, but Sky unsheathed two more swords from his belt. He also had three more swords tied around his belt.