No slander intended, but take a look at this latest update: She outright kills someone over a drunken, rude remark, along with six others who just happened to be in the wrong place at the wrong time. Whether they were family, bandits, or just hired help, it didn’t matter . Both she and Naya aren’t exactly evil, but they operate on a morally ambiguous plane.
Her actions largely depend on how you treat her. She’s indifferent to the fact that you're an enslaved person, trafficked and passed around like a disposable object—be it a tool, a sex toy, or a worker. To her, that’s just the order of things: giants are revered, and tinies worship. In fact, there’s a good chance that some of the slaves in Yakuu's Mansion end up as snacks on a whim. We don't know.
There are three situations where she'll kill you : if you call her a "worm," bring her the wrong slave without apologizing, or in the temple.