Let's pause and give Cyril Tanner some credit for being a real one. Constantly woken up in the middle of the night to take Will, Jem, and Tessa on suspicious outings that Charlotte definitely doesn't know about, and he never even questions their bullshit coverup stories.
Cyril is also in such a messy position in London, because he's literally there to replace his dead brother. Will, Jem, and Jessamine grew up alongside Thomas; Charlotte and Henry semi raised him; and Sophie was his best friend for a year. Even Tessa barely knew Thomas, and she still thinks "he's just like Thomas" every time Cyril does anything. Cyril looks similar and acts similar and fits into the same role in the Institute dynamic, but he's not Thomas and doesn't know these people. They're all looking at him wishing he was someone else, and he's never gonna truly fill that gap because no level of similarity would make Thomas and Cyril the same.









