Scaramouche had never been obsessed before. Not even his desire for power could compare to this new, overwhelming feeling he experiences every time his gaze catches a glimpse of your persona.
You, a new traveler that decided to descend in Teyvat, caught his attention in a way no one has done before. It almost drives him mad. He's a Harbingers, for Archon's sake, a strong and authoritative figure that doesn't bend for others– except for you. At times.
The need to protect and possess you makes him insane. Scaramouche simply adores everything about you, especially your beautiful wings– a trait no humanoid in Teyvat possesses. He would do anything to keep you safe.
One day the Cryo Archon requested a meeting with Scaramouche, warning him about Celestia's intention to attack the fifth descendant; to attack you. Desperate, the Harbinger sought advice to which Tsaritsa suggests to cut your wings off.
It is safe to assume that Scaramouche refused at first. How could he hurt the person he loves in such a way? Is it really okay to go through such lengths just to keep you safe?
However if you fall into Celestia's hands your destiny will turn much worse.
That's why, as much as it pains him, Scaramouche takes the decision to cut your wings. The heartbreaking cries at the loss of your wings, your freedom, hurt him deeply but Scaramouche kept going, telling himself this was for your sake. Once everything is finished Scaramouche begins to slowly take care of the wounds left behind.
"Shhh... It's okay now." He would whisper softly with an uncharacteristic sweetness as he rubs his thumb soothingly in your back. "No one will be able to hurt you anymore, you are safe."