I imagine Genshin Impact will be a much more fleshed out and cohesive game if we give it some time too.
Elysia seems like a person that flirts with everyone, but we don't know much other than how she acts around Mei and people she's know for ages.
While Siegfried is badly injured, Kiana and Cecilia team up and successfully defeat a recreation of 2nd Herrscher, Sirin.