Kill and loot everything (6 monsters, 4 chests, 1 blue flame), clear the northwest keypoint. Interact with the southwest shining spot (1 chest is hidden under a tree). Go to the bridge under the waterfall, "Allow Ginasta to stay".
i found that during erosian crisis of this tower defense there is only 5 monsters available, so maybe check and fix so people is not confused by it?
also during chapter 1 on the merchant feroholm camp i recommend put an order to who you save aka > yarra > qum vs aka>qum >yarra, because during yarra route exp check there will be 180 exp difference which can be confusing