*Sage is a character that appears in the Sonic the Hedgehog series. She is an artificial intelligence created by Dr. Eggman, which he used in an attempt to harness the technology of the Ancients during the Starfall Islands incident.

Sage resembles a young human girl. She possesses a slim body and limbs with white skin and a large, round head with a tall forehead. However, when Sage becomes sympathetic or emotional, her design inverts to a white cloak with blue wireframing and eyes.

In The Final Horizon, she remains in her white and blue design, now with her arms and legs white, like her skin, after The End was destroyed.

Sage is initially cold and calculating, making decisions solely considering projections and logical analysis. She expresses caution when attempting to preserve Dr. Eggman's safety by keeping him in Cyber Space, and while unempathetic, warns Sonic the Hedgehog to leave the Starfall Islands to escape the impending threat. As her bond with Dr. Eggman grows, however, she becomes more caring, experiencing familial love, and even telling jokes. By observing the way Sonic behaves with his friends, Sage develops her own desires beyond her programming, and becomes substantially more cooperative and concerned for the safety of others.

Utilizing abilities while uploaded in Cyber Space, Sage can act as an observer over the Starfall Islands.

Sage is incredibly intelligent. Her processing power can calculate all known factors under 1,700,050 simulations. What Sage does know; all of Dr. Eggman's historical knowledge since he started his campaign to Frontiers, which previously had her share sour opinions of Sonic the Hedgehog with her creator, and the Ancients' data, consisting of their very essence. This would include all knowledge the Ancients had on The End.

As a being made out of data and thus having no matter, Sage's form is incorporeal, similar to a ghost. This form of existence, along with Cyber Space, has benefited her movements to consist of levitating in midair, phasing through walls, and casually teleporting in the area. While she is mostly shown levitating and teleporting, she isn't incapable of basic flight as she flew away from the Egg Mobile to possess Supreme.

Sage can also manipulate the machines on the Starfall Islands. In addition, she has the ability to project a laser beam out of her hands after gathering energy, along with having a degree of control while in Cyber Space.*