Baraggan Louisenbairn/Expanded Universe

is an Arrancar in Sōsuke Aizen's army and the Segunda (2nd) Espada. Prior to this, Baraggan ruled Las Noches as the God-King of Hueco Mundo.

Bleach: Can't Fear Your Own World
In the primeval days of Hueco Mundo, Baraggan Louisenbairn was one of the very first Vasto Lorde Hollows to have walked its sands. Eventually, Baraggan came into conflict with a particulary powerful Adjuchas and the two found a healthy respect for each other's powers. The two Hollows realized that a fight between them would be dangerous and therefore made a pact never to interfere with each other.

Bleach: Spirits Are Forever With You
At some point during Baraggan's time as ruler of Hueco Mundo, Baraggan recruited a powerful and highly intelligent Vasto Lorde named Szayelaporro Granz as his alchemist.

Powers & Abilities
Immense Spiritual Power: