One of the best things about Genshin Impact is getting to know its various characters. There are all kinds of people living in Teyvat, including some who work with the Fatui. Scaramouche is a member of Fatui and a character you've probably heard of since before Dragonspine existed.
Although he only appears in the story towards the end of Inazuma's story arc, Scaramouche has been around for quite some time. Scaramouche debuted in version 1.1 of the game during the Unreconciled Stars event.
Related: Who is Baal in Genshin Impact?
He was revealed to be a Fatui Harbinger in search of Teyvat's secrets. He appeared again in Inazuma at the Illusion Factory, where he nearly killed the Traveler. In exchange for Traveler's life, Yae gave Scaramouche electrognosis.
After talking to Yae at the end of the story, it is revealed that he is actually a puppet created by Ai. He wandered into Inazuma, where he was entangled and possibly betrayed by part of Nagamasa's group, before being picked up and modified by the Fatui.
Currently, his location is unknown as he apparently abandoned the Fatui and fled with Electrognosis.
When will Scaramouche be released?
Many fans are hoping Scaramouche will be an upcoming playable character, much like Tartaglia. Due to La Signora's fate and MiHoYo's lack of confirmation, her playable status is currently unknown.
If he becomes a playable character, you probably won't be able to shoot for him until 3.0 when Sumeru comes out or later.
For more Genshin Impact content, check out How to Unlock Serenitea Pot in Genshin Impact on Pro Game Guides.