I have a test where I am given the following article, what is an answer for the question: Who stops the cultured young woman from escaping? ?

Amantha Starr is the privileged daughter of a Kentucky plantation owner. However, after he dies, a shocking secret is revealed: Unbeknownst to Amantha, her mother had been one of her father's black slaves. Legally now property, she is taken by a slave trader to New Orleans to be sold. On the riverboat ride there, he makes it clear that he intends to sleep with her, but desists when she tries to hang herself; as a beautiful, cultured young woman who can pass for white, she is far too valuable to risk losing.
Amantha is put up for auction. When she is callously inspected by a coarse potential buyer, she is rescued from further humiliation by Hamish Bond, who outbids the cad, paying an exorbitant price for her. Expecting the worst, Amantha is surprised to be treated as a lady, not a slave, by her new owner. At his city mansion, she meets his key slaves, his housekeeper (and former lover) Michele and his conflicted right-hand-man Rau-Ru. Rau-Ru is grateful for the kindness, education and trust Hamish has bestowed on him, but hates him anyway because his kindness is a more insidious method of keeping him enslaved than overt cruelty would be. Michele tries to help Amantha escape, but Rau-Ru has been watching her for Hamish and brings her back to the mansion.

Rau-Ru