- "Your mocking laughter still rings in my ears from our last encounter. But sweet relief is at hand, for my friend here is an artisan of pain, and your cries for mercy will be like a soothing balm as he pummels you insensible! Adar-- practice your craft!"
- ―Abu orders Adar to attack Branan at Delilah's palace[src]
Abu is a Phoenician slave merchant and partner in crime with Delilah and her many treacherous schemes. There is strong indication that his kidnapping of Saphira (Delilah's daughter) was staged under Delilah's direct orders, perhaps because she wanted to foment a stronger bond between Branan and Saphira by having him save her. A few chapters later in the same volume, Abu appears in Delilah's palace in Jabneel and she refers to him as her friend, which would be an entirely inappropriate way to interact with her daughter's abductor if Delilah herself were not in charge of the kidnapping.
In a twist of irony, Delilah ends up punishing her daughter for letting Branan out of their dungeon by selling her to Abu to be auctioned off into slavery. But when Branan shows up at the slave market and rescues Saphira, Abu is left with having to deal with Delilah and her two vicious bodyguards, who intend to collect Abu's debt to their mistress one way or another.
As a man who makes more than an affluent living selling human flesh into servitude would be, Abu is a cruel man, indeed. Without a pang of conscience apparently, he feasts heartily on rich meals of lamb and wine while starving his human "stock" in their cold, filthy caged pens. Abu clearly takes psychopathic delight in torturing other creatures, as it would make little business sense for him to allow his slaves to waste away before putting them up on the auction block for potential buyers to inspect for quality and bid on.
However, in a form of poetic justice, Branan not only sets two of Abu's slave caravans free, he lets Abu's house servants go and then ransacks the slaver's home. One is left to assume that Abu ends up as penniless as Sidon did when Branan and his men raided and burned down Sidon's garrison at the end of volume four.