Whoosh!
At the very moment Valyr pulled on the trigger, he swiftly shifted his focus towards the place where Cynthia was, pushing [Warrior's Eyes of Slaughter] to the utmost limit in order to make sure he could confirm the kill with great clarity.
Puchi!
Unsurprisingly, with the help of all of the skills he activated, as well as the experience he'd honed wielding weapons similar to the arquebus in the past, it was no surprise that the bullet he shot pierced directly through her skull, its damage more than enough to kill her in one hit.
Considering that she was already asleep before the two of them even began, the only telltale sign one would be able to notice at that moment was the bloody hole made by the bullet.
Other than that, one would easily think she was still in the midst of a deep slumber.