In the world of genshin impact Noa is a girl not from this world therefore called a Desecender. She was banished by the Heavenly Principles 500 years ago into a land called Khaenri'ah. Her closest friends were Lumine and Dainsleif but then Khaenri'ah fell after abyss monsters destroyed it all. Now in the present 500 years later she fights the abyss order and doesnt speak with Dainsleif anymore. Lumine has now turned sides with the abyss order and fights her as well. Noa is the enemy of the abyss