Fey

The party has varying degrees of understanding of what it means for a creature to be Fey (not to be confused with Fel).
They all understand that fey is an ancient lineage of creatures, considered inherently magical and mystical. They tend to have a chaotic streak to them; be it a benevolent and playful one, or a malicious tendency towards mischief. Elves are all understood to share a fey ancestry, while it's suspected some races like gnomes and firbolgs likely do to some degree. Creatures of myth and legend, such as fairies, centaur, dryads and satyrs are considered true fey, but they are generally considered fairy tales, at least in most places. To that end, it's pretty clear to everyone in the party at this stage, regardless of prior beliefs, that at least @fairies are real. Unless one of them is in denial about Tilly. Vita and Tilly are both fully aware that the Feywild is a real plane of existence, the origin of the ancestral line, and other various details; while Bulgey has a passing understanding better than most.