1, sona has like this infection/parasite thing. it has a similar fading mark like arlecchinos, just a light-icy blue thats on her hands up to her forearms and legs up to her knees + spotting along her ribs and waist. 2, she has a huge scar along the left side of her waist, i have no lore on that yet. 3, she's quite friendly with a lot of the women in fontaine and often visits chiori and emilie when she goes to the surface. yume-fact, i'll do souwrio dynamic, they very much are cat in dog, in the sense that wrio is affectionately annoying and sou begrudgingly accepts it but also does adore it.
so basically, V!XEN were originally angels but because they couldn't maintain order between all species, they were punished and forced to live the rest of their lives as fallen angels with painful rebirths. they can still use their powers, its just signifigantly weaker in their fallen state (theyre technically still strong, but theres a huge power difference).

i'd say try to log in every day to get the weekly coins + surprise bag at the end of the week! (also click this whenever you log in. its in every page on nav bar aside from Catch) also play spinami (under catch in the nav bar) bc you can get an item with a free spin. alot of the really good items (boxes, single items, etc) are behind gaia cash (bought with real currency) so i really wouldnt reccomend unless theres like an item or box you REALLY like. I will say, buyinig a cloud 9 membership will give you a free item on the first of every month. ALSO if you buy anything from marketplace, LOOK CLOSELY at prices bc A LOTTT of users overprice the FUCK out of items. you can also buy premade outfits on marketplace
also, i'm pretty sure when decorating profiles you can use css! oh also, items aren't completely colour tagged, so to get pink mostly items you'd have to input "cute", white is "pure", purple & green is "melty" so on & so on.