Murbella was a promising young Honored Matre who was captured by the Bene Gesserit and trained in the ways of the Sisterhood. She later became both the Mother Superior and the Great Honored Matre, uniting the bitter enemies.
Murbella was raised as an Honored Matre from an early age. She was deemed to be a trainee of particular promise when it was revealed that she possessed physical and mental abilities far above average. Among these abilities were almost unimaginable reflexes, which ran independent of her central nervous system. As was common of females of Honoured Matre heritage, she also possessed the ability to amplify sexual ecstacy to near unimaginable levels.
During a stay in the city of Ysai, Murbella captured a Duncan Idaho ghola and attempted to imprint the Bene Gesserit loyalist. However, thanks to powerful abilities the Tleilaxu have secretly built into him, he was able to partially resist her, and instead imprint himself onto her psyche. Thus the pair became sexually addicted to one another.
When the pair later fell under the custody of the Bene Gesserit, the Sisterhood made good use of Idaho's new-found abilities (and addiction to Murbella) to extract some information from the vulnerable young Honored Matre, and later start her training as one of their own.
Murbella's training with the Bene Gesserit was protracted and often confrontational. However, their shrewd methods and use of her bond with Idaho enabled them to slowly turn her to their collective will. Additionally, Murbella provided the Sisterhood with four daughters, uniting the genetics of Idaho and the Honored Matres into a powerful combination.
After Murbella survived the Agony, Murbella became a full-fledged Reverend Mother, though she still held some deep-seated loyalty to the Honored Matres, and also to Duncan Idaho, thanks to their mutual sexual addiction.
Rise to Power
After the death of Mother Superior Darwi Odrade on Junction, Murbella emerged as the tacitly approved head of the Bene Gesserit. During the same confrontation that led to Odrade's death, she killed the Great Honoured Matre and so became the official leader of both the Bene Gesserit and the Honoured Matres.