Cyrus (Chrono Trigger)

Cyrus was one of the bravest and strongest of the Knights of the Square Table in the Kingdom of Guardia in the years prior to 600 A.D. in Chrono Trigger. Glenn, who later became Frog, was his long-time friend. The first time the player sees Cyrus is in a couple of flashback sequences.

The Masamune!
Frog flashes back to a time before he became a humanoid amphibian. He remembers how Cyrus protected him from bullies as a kid, and later when he enlisted in Guardia's army.

He also remembers when he and Cyrus left Guardia Castle in search of the Masamune with which to fight Magus' army. Along the way, they battled the Frog King. But later on in the journey, Cyrus was killed by Magus.