Dio

Dio is one of the central protagonists in Tales of Phantasia: Narikiri Dungeon who strives to lift the curse that was placed on him by the gods.

Dio's role
Dio fell from the sky twelve years prior to the game's opening along with his sister, Mel. The two of them were found by a mysterious stranger (the player) who raised them in the Narikiri House until they were around thirteen. Up until that point, nobody knew quite where they came from, but one day, a man named Norn appeared who seemed to know about their past. Apparently, they'd once committed terrible crimes and their punishment was a curse from the gods. The only way to stop this would be to travel to the past and undo what they did, but first they had to meet the Heroes of Eternity and fight off twelve Summon Spirits.

Origin
Eventually, Dio learned that he was a scientist on Derris Kharlan named Dios in a past life. Together with his sister Meltia, he used to build incredible magitech weapons for his home country. Unfortunately, the weapons' power grew out of control, yet Dios was certain that she could tame them. He was wrong though and the weapons exploded, taking with them all of Derris Kharlan's mana and killing the world tree.