John Watson quotes from Sherlock

Who are you?

Isn't it obvious? Haven't you guessed? I'm Eurus.

Eurus?

Silly name, isn't it? Greek. Means the "East Wind." My parents loved silly names, like Eurus, or Mycroft, or Sherlock.

Oh, look at him. Didn't it ever occur to you, not even once, that Sherlock's secret brother might just be Sherlock's secret sister? Huh? He's making a funny face. I think I'll put a hole in it. [pulls the trigger]