Genshin Impact leaker gives away 15 massive leaks in his last post, asks fans to analyze
Genshin Impact leaks: Kuki Shinobu, Heizou, and Yelan release roadmap
Genshin Impact Leak Potentially Reveals Dendro Archon Model
'Genshin Impact' update 1.5 leak reveals 22 new weapons coming to the game
Genshin Impact Leaks: Itto Leaks Gameplay, Constellations, and Skills
If you are unsure, mark it as a spoiler anyways.
C2 is very useful on a full Geo team, which appears to be the lineup of Itto, Albedo, Zhongli, and Gorou.
There is a total of seven main nations in Genshin Impact, and each of them has its respective nation with its divine ideals.