Kujou Sara, in spite of being just a 4-Star character, may just be one of the most popular characters in Genshin Impact. She's arriving on Genshin Impact 2.1, and miHoYo isn't sparing any resources to hype up her arrival. As per standard, a new character demo trailer was released just for her. Kujou Sara's Trailer – ‘Thunderous Devotion' – showcases her loyalty towards the Electro Archon, the Raiden Shogun.
Kujou Sara Trailer ‘Thunderous Devotion' from Genshin Impact
Kujou Sara is one of Baal‘s most trusted lieutenants. She first appeared during the Archon Quest ‘A Flower Blooms in a Prison'. She appears in the police station where Master Masakatsu was being held. In spite of being one of the leaders of the Vision Hunt Decree, Kujou Sara allows The Traveler, Paimon, and Yoimiya to take away Master Masakatsu because of the grave injuries the old man has received from his prison guards. However, this should not be taken as a sign of kindness – Kujou Sara simply didn't believe Master Masakatsu was a threat at the time.
As can be seen from Kujou Sara's trailer, she's deeply loyal to the Raiden Shogun. This is in spite of her being an adopted daughter of the Kujou Clan. She's a skilled Electro Bow user, and she hones her skills to undertake Baal's bidding.
Genshin Impact 2.1 releases in a few days. You might want to pull for Yoimiya while you still have a chance. Alternatively, here are the reasons why you should save up your Primogems for Baal and Kujou Sara.