Tessa was the main character of prequel series the Infernal Devices, but in Lady Midnight she’s probably going to be a very different character. Sorry Tessa, but you’re one of the grownups now. You are the establishment, albeit the cool establishment. With that in mind I tried to cast slightly more mature actresses, without going to old since Tessa is an immortal. And Sarah Grey’s name was just too good to pass up. Fare thee well, Tessa. Be a a chill adult, not a highborn kinsmen.