Herian has exactly zero faith in Sina to stay on her own horse unaided. Instead she swiftly heaves the Dalish up onto Herian's own horse, lying on her stomach for a moment while Herian swings herself up onto his back, and then lifts Sina so she's sitting in front of Herian, better to keep her held in place. Quickly need not be said - she moves with as much haste as she is able, only pausing to look to Pel, a silent question to see if she needs anything else, if anything need be done or seen to.

And, if the returning look does not suggest it? Then she is ready to go at the first suggestion of it.