Ace

Ace is Supersonic Red, the Red Ranger and leader of the Supersonic Rangers. He was a Xybrian.

Legacy
Despite the fall of the Supersonic Rangers, their powers were preserved in the form of the Legendary Ranger Keys possessed by Gosei, apprentice of Zordon. Ultimately, their powers were inherited by the Super Mega Rangers as one of their "New Powers". As noted by Gosei, these teams had never been seen before on Earth, at least the Earth of the prime timeline, up to that point.

Ranger Key
The Red Supersonic Ranger Key is Ace's personal ranger key. Despite the destruction of the Supersonic Rangers, Gosei seems to possess their powers via the Legendary Ranger Keys. This key is mainly used by Troy Burrows (Super Megaforce Red) who uses it to fight as the Red Supersonic Ranger. Although it has not been used yet, it's presumed that it exists.