Here are some images of Ganyu banner in Genshin Impact 1.2 including the release date, and 4 stars character that comes along with Ganyu banner.
Genshin Impact 1.2 Ganyu Banner
Ganyu is a second 5 stars character that coming to Genshin Impact. She is a half-human, half Adeptus Cyro archer from Liyue Qixing.
This Ganyu banner's release date will be 12 January (or 13 depending on time zone).
Here take the first look at Genshin Impact Ganyu Banner.
As we look at the image we can see 4 stars characters that comes along with Ganyu such as Xiangling, Xingqiu, Noelle.