WARNING: There are spoilers ahead for "Games of Thrones" season six.

Daenerys Targaryen may be your favorite character on "Game of Thrones," but some fans have theorized she could be going down a dark path.

The theory goes that there are a few troubling characteristics of Daenerys both in the show and in the books that could lead to her eventual turn towards becoming an evil character, just like her father.

And while this episode did lend some credence to this theory, in the episode commentary, "Game of Thrones" showrunner D.B. Weiss shut this idea down once and for all.

"She’s not her father, she’s not insane, and she’s not a sadist," Weiss explains. "But there’s a Targaryen ruthlessness that comes with even the good Targaryens."

This is a pretty strong dismissal of fan theories about Daenerys slowly devolving into her father as she takes on more and more power. While Daenerys has remained fairly sane so far, the Targaryen dynasty has a history of mental illness and madness, mainly due to intermarriage. Daenerys’ own father, King Aerys II, was called the Mad King because he became paranoid and started killing people and hiding wildfire around King’s Landing.

And in the past, we've seen that Daenerys has a penchant for violence, vengeance, and does not flinch from burning those who disagree with her, whether they're Mirri Maz Duur in season one or the Khals in season six.

This is Daenerys' conquering face. HBO

But the first scene in episode nine between Tyrion and Daenerys addressed these concerns and reminded her of the limits of vengeance. It even ended with Tyrion cautioning his queen about the excessive use of force:

"I will crucify the masters, I will set their fleets a’fire, I will kill every last one of their soldiers and return their cities to the dirt," Daenerys says. "That is my plan. You don’t approve."

"You once told me you knew what your father was," Tyrion answers. "But you know his plans for King’s Landing when the Lannister armies were at his gates? Probably not. Well he told my brother and Jaime told me. He had caches of wildfire hidden under the Red Keep, the guild halls, the Sept of Baelor, all the major thoroughfares. He would have burned every one of his citizens, the loyal ones and the traitors. Every man, woman, and child, that’s why Jaime killed him."

"This is entirely different," Daenerys argues.

"We’re talking about destroying cities," Tyrion responds. "It’s not entirely different."

Though she's heard rumors before that her father was insane, this is the first time Daenerys is hearing definitive proof of why people wanted him dethroned and dead.

She even started referring to her father as "evil" later in the episode when she speaks with Yara and Theon Greyjoy.

"Our fathers were evil men, all of us here," she says. "They left the world worse than they found it. We're not going to do that. We're going to leave the world better than we found it."

"We're going to leave the world better than we found it." HBO

While Daenerys may have come back into Meereen an angry conqueror, she quickly pivoted to her role as savvy ruler, after some careful prodding from Tyrion. Daario may have previously told her she wasn't "made to sit on a chair in a palace," yet that's exactly where she is in Meereen — sitting in her throne room and using political alliances to help her reach her goal of becoming Queen of Westeros.

That's not exactly the crazy, take-no-prisoners Daenerys Targaryen we have been seeing this season.

Still, despite showrunners shutting down the thoery that she will become evil, there could be a complicated friction when Daenerys does finally sail to Westeros. Instead of being the hero she assumes she will be, Daenerys could likely face opposition and bring destruction and death to the kingdom.

On the other hand, she possesses dragons that could be the key to defeating the White Walkers (at least on the show). We know that valyrian steel and "dragonglass" — two things believed to be made with dragon fire — can kill the White Walkers, so it stands to reason that actual fire from actual dragons would do the trick, too.

So while she may not be greeted in Westeros as a hero, she and her dragons could fast become their only hope.

With Jon Snow now ruling in the north and Daenerys sailing in from the south, it's likely Westeros will see these two power players meet somewhere in the middle. When they do, there are so many options at play. Will they find a kindred spirit in one another? Will they hate each other? Will they be forced to work together or clash horribly, causing another war to break out in the Seven Kingdoms?

It looks like at least on the show, Daenerys is back to being a heroic character, at least in the showrunners' eyes. Whether this is how George R.R. Martin will end his series remains to be seen.