Welcome, Kaylie! I'm Jess, I play Artemis (shaftsofgold), Bia (rawforce) and Guanyin (hears_every_cry). Artemis, I imagine, will be super protective of her little sister, especially in light of Persephone's abduction, and will likely try to pincushion the demon responsible full of arrows if he ever shows his face again.
(Bia might join in, partly because she's not one to stand for anyone messing with Olympians and Olympian-adjacent, and partly because Bia thinks every problem can be solved with violence. Guanyin, who has significantly more chill than either of them, would be more likely to offer her a warm cup of tea and a sympathetic ear.)