General Radahn, the Starscourge, is known to be among the strongest of the demigods. From the time of his childhood he admired the warriors who came before him, seeking not only to march along their path but surpass it tenfold.

Just as noteworthy as the general's strength, however, is his kindness. His lifetime has not only been spent conquering the Lands Between, but studying gravitational magic as to not crush the scrawny steed he has long since outgrown. It was with gravitational magic that he learned to hold up the sky and arrest the cycle of the stars, preventing a meteor from crushing the town in which he studied the magic that captured his heart.

Possessing both the strength of a warrior and a pure heart, he was always admired by his half-brother, Miquella the Kind. When the young Miquella began his ascent to godhood he spoke a prayer to Radahn, asking him to be his consort in exchange for upholding some part of a vow; his answer, however, remains unknown. A missing chapter in a story which ends in him being consumed by Scarlet Rot, both body and mind turned to nothing but decay.

Voice Reference: General Radahn has no voice we hear in Elden Ring, so its up to your interpretation completely. Whatever comes to mind when you think of the Redmane General, the Starscourge, and the 25-ft tall demigod who defied gravity because of how much he loved his horse.

"The General was blighted by scarlet rot and driven to madness, but not long ago he was hailed as the mightiest demigod of them all."

"The stars alter the fate of the Carian royal family. And the fate of your mistress, Ranni. But long ago, General Radahn challenged the swirling constellations, and in a crushing victory, arrested their cycles."

"Eaten from the inside, by Malenia's Scarlet Rot, his wits are long gone. Now he gathers the corpses of former friends and foes alike, gorging on them, like a dog. Howling at the sky."
References:
https://eldenring.fandom.com/wiki/Starscourge_Radahn