When an Rift Demon appears suddenly before her, what is Arturia's first instinct to fight a thing she's never seen in her life from a world beyond her comprehension? Go grab a sword on the ground and fucking kill it!
How she does it go about it? Why, by ramming her through said demon before running the tip of her blade through the other Rift Demon that her current warden is fighting off! Thus killing one, while weakening the other for an easy kill for Cassandra.
The beginning about Arturia and Cassandra learning to be Smash Sisters as they make it through the Valley and killing all sorts of demons in their way. Basically, its two kickass Action Girls absolutely slaughtering any creature spawned from The Legions of Hell that is foolish enough to get in their way.
At the end of the chapter, Arturia up and decides to personally lead the group into the Valley, seeing this as the best she can do for the many of soldiers that are most definitely going to die getting to the Breach. After such a bold action, practically EVERYONE decides to follow her in order to get her to the Breach as safely as possible. Can anyone say Magnetic Hero or what?
Thanks to the power of the Mark/Anchor, Excalibur is now an Living Weapon...and is now officially the Excalibur from Soul Eater.
Chapter 5:
Solas knows EXACTLY who Arturia is and is simply waiting to see what she does next to change Thedas.
Chapter 6:
After utterly beating back the rogue Mages and Templars warring in the environment, the Inquisition plants their flag, effectively making an Declaration of Protection that extends to the entirety of the Hinterlands.
Chapter 8:
While chapter 2 shows some of it, this chapter completely hammers in just how much of an Magnetic Heroine Arturia Pendragon is, getting a whole new slew of followers, believers, and members for the Inquisition's cause that GREATLY bolsters the group's forces and influence.
The Elder One revealing that they have a past with Arturia to her subordinates casually, scarily yet accurately summing up the kind of person she is. It is very clear that this is a villain NOT to be trifled with.
The above totally PALES in comparison to the Arturia burning hot flaying delivers to the Lord Seeker Lucius. Like in canon, the Lord Seeker has one of his men punch out Hevara in front of everybody before going to insult everyone within earshot. Unlike canon, however, the Herald aka Arturia isn't having NONE of his self-righteous bullshit:
Lucius: You have showed me nothing. The Inquisition...is less than nothing.
With every word relayed by Arturia, the anger of the Templars slowly diminishes into that of thoughtfulness, and realization evolves into horror and the uncertainty of how to rebuke her undeniable truth. With every word said by the Herald of Andraste, the crowd around them exchanges looks of uncertainty, morphing into the agreement of her truth, and the deep contempt with hatred shot through their increasing glares towards the Templars.
The siege of the fort at the Storm Coast, which showcases just how good of a Strategist the King of Knights is after so many years of obtaining this kind of experience.
Shout out to Sera, who single-handedly weakened the entire fortress beforehand without getting caught until it was far too late for its defenders.
Chapter 17:
The Inquisition group of companions proving themselves as quite the Badass Crew by taking on and killing almost everythingthe Fallow Mire had to throw at them, calumniating in them saving the captured Inquisition soldiers.
Chapter 23:
Cullen's Rousing Speech to the Templar Order very much deserves mention:
Cullen: We have a new mission to take, making right with what's left in this hold. I once served the Order faithfully, and even now, I still have faith in what it stands for. To protect the people of Thedas, in service of the Maker. For anyone who still believes in their cause, to truly and willing to stand for protecting Thedas, and fight against those who had threaten to dismember and turn our order into a catalyst of destruction. Even as we fight against our own, we fight in their honor and the life of everyone that live outside these walls. We are what's left to stay true to our oath, what says you men!
Chapter 31:
With the combined forces of the Mages and Templars, a situation previously thought to be impossible, Arturia manages to close the Breach