Magdaran Bael is the youngest son of Lord Bael and the only child of his second wife, and the younger half-brother of Sairaorg Bael. Magdaran is noted to resemble his half-brother Sairaorg in appeareance, having black hair and the signature purple eyes of the Bael Clan.

Founder of Bael Clan, he became the de facto leader of the Devils after the death of the original Four Great Satans. The current Head of the Bael clan, younger half-brother of Venelana and father of Sairaorg and Magdaran.

Magdaran watches as Sairaorg fights Bedeze as he promised to protect his younger brother and activates his Breakdown the Beast, easily overpowering and destroying all of Bedeze's Holes.

Several years later, Lord Bael took in his legitimized half-sister Ellyn as his mistress and gave birth to his second son, Magdaran, who he made the new family heir.

After Sairaorg was exiled from the family with his mother, their relationship became very distant, and under Lord Bael's influence, Magdaran came to feel contempt for Sairaorg for not inheriting the Power of Destruction which worsened into hatred when he …

Sairaorg Bael is the heir of the Bael Clan. He is the oldest son of Lord Bael and the only child of his first wife Misla Bael, the older half-brother of Magdaran Bael, and the cousin of Rias Gremory and Sirzechs Lucifer. He was known as the strongest young Devil before being beaten by Issei.

His plan, however, was foiled when Sairaorg was able to overwhelm and defeat Magdaran, forcing Argilac to make him the new heir while Magdaran was forced to leave the Bael territory in exile, only keeping the name Bael per Sairaorg's request.

Sairaorg Bael is the heir of the Bael Clan. He is the oldest son of Lord Bael and the only child of his first wife Misla Bael, the older half-brother of Magdaran Bael, and the cousin of Rias Gremory and Sirzechs Lucifer. He was known as the strongest young Devil before being beaten by Issei.

Magdaran Bael is the youngest son of Lord Bael and the only child of his second wife, and the younger half-brother of Sairaorg Bael. Magdaran is a dedicated botanist having a deep fondness for plants and flowers, particular the purple flowers that bloomed throughout the Bael city.

Lord Bael (バエル卿, Baeru Kyō) is the current head of the House of Bael and the father of Sairaorg and Magdaran, the husband of Misla and an unnamed second wife, and the younger half-brother of Venelana.