In this case, Natasha and her friends.
Natasha is one of the “owners” of Catherine, who she decides to treat as a “pet” because she reminds her of a cat (hence the name CATherine). Natasha and her friends invite Catherine into the friend group and they all live together, but Catherine is treated badly there and Natasha makes a plan to kill Catherine.
She doesn’t see Catherine as a person, but as an actual animal, a tool, and a nuisance, and wants to badly mistreat her which ends up traumatizing her.
well, it epends on the person’s society and culture that they’re from. Natasha’s, not Catherine’s. If, for example, it was normalized like, say ancient rome- or basically anywhere else more than ~200 years ago- it could still be lawful. A foreign paladin coming from a land that had abolished slaves would be the odd one out; though if they do anything to stop it, they’d tip into neutral or chaotic good.