There are multiple points in Daughter of the Earth and Sky where Hades gives Persephone a very specific set of instructions.
That she promptly ignores.
Sometimes she ignored him because she’s charmed (see last Friday’s post). Others because Persephone is impulsive. It’s her character flaw. She’s impulsive, naive, and she thinks she knows best. A chunk of the time she’s right, but not always. It’s not a new character development. This is the girl who ran away from home in book one then ran away from The Underworld to face Boreas. She’s never, regardless of the stakes, sat quietly and listened as other people make decisions. Not once in six books. It’s frustrating. But she also has a way of getting things done.
We all know people like her in real life.
But by the same token, Hades is wrong just as often as she is. There seems to be this impression that if she’d only listened to him x or y would have happened, but that’s not necessarily the case. There is no other way the conversation with Poseidon would have gone, regardless of who was speaking. Poseidon had days to plan exactly what he was going to say and how he was going to say it. Hades didn’t have all the information about Joel or about Zeus or about Aphrodite, so her listening to him in those cases would have led down a different path. But not necessarily a better one.
She is growing as character, and being less impulsive is one of the places where she’s going to grow. But she and Hades are also growing in terms of having a healthy, functioning relationship where they listen to each other instead of both just doing their own thing because they’re convinced it’s for the best. In other words, it’s not just her flaw.