Lansan can be seen in the Genshin official storyline trailer. Nothing has been revealed about the character.
Mondstadt Region Puzzles, Secrets, and Hidden Chests
Puzzles, Secrets, and Hidden Chests in Dragonspine
How to Beat Monsters/Farm Enemy Drops
Crystal Core Farm Locations
Xiao & Invitation to Mundane Life Event Wish
Ganyu Event & Adrift in the Harbor Wish
Top Mining Spots in Dragonspine