The Phoenix, the Lionfang, the Star-Born Traveler, and the Wind

To say that Diluc was frustrated would be an understatement. Mondstadt was under attack from its own protector, Jean was being standoff-ish ever since he returned, a Traveler from the stars has appeared and agreed to help them with their Stormterror problem, and their Archon just happened to be a drunk who frequented his tavern. (Full Summary on AO3. Part 7 of Icy Zombies.)