Vistani

What we know

Nomadic people of Barovia; can travel beyond the mists at will (Session 6 @ 00:23:57)
Tser Pool encampment described as hospitable camping spot on road toward Vallaki (Session 4 @ 02:35:37)
Tser Pool treated as neutral ground—not openly serving Strahd von Zarovich, but not provoking him (Session 7 @ 00:03:53)
Party heard rumors some Vistani serve the devil; Madame Eva said none at Tser Pool camp were in league with him at first visit (Session 6 @ 00:26:57)
Stanimir told origin tale of wounded prince nursed by Vistani who became cursed tyrant Strahd (Session 6 @ 01:07:04)
Game of Stories expected of guests who dine and drink at camp (Session 6 @ 01:01:25)
Baron Vargas Vallakovich hostile to Vistani; forbids entry to Vallaki walls (Session 9 @ 02:25:09)
Separate encampment outside Vallaki palisade with wagons and Dusk Elf hovels nearby (Session 9 @ 01:30:42)

Madame Eva — matriarch, Tser Pool (Session 6 @ 00:20:56)
Stanimir — host at Tser Pool (Session 6 @ 00:18:08)
Eliza — Tser Pool; Vistani spy for Strahd von Zarovich; executed (Session 6 @ 02:33:49)
Arturi Radanovich — traveler at Tser Pool (Session 6 @ 00:43:01)
Elmo — traveler met at Barovia Village; close companion Johan (not Vistani) (Session 4 @ 00:02:38; Session 4 @ 01:05:52)
Luvash — leader at Vallaki Vistani Encampment (Session 9 @ 02:15:12)
Arabelle — Luvash's daughter; Madame Eva's great-granddaughter (Session 6 @ 02:47:44)
Alexei — camp member at Vallaki Vistani Encampment (Session 9 @ 02:18:14)
Yan — longtime member at Vallaki Vistani Encampment; killed (Session 9 @ 02:19:04)

Elmo and Johan suggested party consult Madame Eva at Tser Pool (Session 4 @ 01:05:52)
Party shared wine, stew, and Game of Stories at Tser Pool (Session 6 @ 01:01:25)
Luvash sought party help when Arabelle vanished (Session 9 @ 02:18:14)

Unconfirmed: whether any Vistani at Vallaki Vistani Encampment serve Strahd (Session 6 @ 00:26:57)
Unconfirmed: whether Yan betrayed camp or was framed (Session 9 @ 02:23:56)