Olivia will be attempting to appeal to the goblins who appear unaffiliated. In particular, she will be approaching those who are vendors, as she has done some business with them before for food and the like. Keats, a non-human, will be accompanying her in order to act as protection, though he will not be doing anything but remain a silent presence (for the most part, at least) unless any action needs to be taken. Olivia is human, but she has had some interactions with goblins before; they'd mingled within bars, shared drinks, was part of the goblin holiday tasks, picked some cereus plants for their church, and even danced with/for some during the sunrise celebration. She doesn't outright attempt to suggest any grandstanding peace treaties right away; initially, she'll just try to get a feel for how their temperaments and feelings towards humans and peace in general are, before attempting to broach the topic. In her attempts to gain their favor, she'll probably do nearly anything they ask of her, even if it's embarrassing.

...she'll also probably end up unconsciously sweet-talking some of them.