2.8 weapon banner and character banner from the same account that leaked "Cleo"s real name. They also posted the character banner a day before Lumie did. : r/Genshin_Impact_Leaks
New Leaked for Genshin 2.7 & 2.8 Banner Announcement - YouTube
Genshin Impact 2.8 Livestream Character Banners, Weapons, Event News