If Brynn chooses an emey's square as her dash destination, then that is where the attack portion of the dash originates from even though she will likely land somewhere else This is especially jarring if Rampart is the target and he deploys his shield: it will look like her attack is bypassing his shield.

Explaining via pictures: This works (hitting both targets), even if Rampart uses his shield (towards where Brynn is now, which is also towards where Brynn lands.)