Merlin's Father

Belialin was an elder sage and chief of Belialuin, the capital of the wizards.

Appearance
Merlin's Father had a young appearance with defined features, he wore a wizard's robe, had long dark hair and had three piercing in his left earlobe.

After returning from Purgatory his appearance was reduced to that of an invalid, looking old and sickly.

3000 years ago
While Merlin was still a small child her father discovered a way to travel to Purgatory, a dimension that exists between the living world and the afterlife. After a single minute in this dimension Merlin's father returned back looking as an old, invalid person. Bedridden, he explained how Purgatory is a place of chaos where mutilated souls and predatory monsters seek prey, how there's scorching heat, blistering cold and toxic air that destroys the flesh of the living and how time and space are warped, saying that a minute corresponds to a year in there.

Abilities/Equipment
Merlin's father is implied to have had great knowledge and incredible magical power as he was the chief of the capital of the wizards and discovered a way into Purgatory, surviving in it for a year.

He also had the capacity of a "sixth sense" as he stated he relied on it while in Purgatory as perception is lost in there.