I think this photo may make sense now. The E string is broken. There are 4 strings. The 4 strings represent the 4 Holmes siblings; Sherlock, Mycroft, Sherrinford and now, Eurus. The E string snapped. Eurus probably had some sort of traumatizing thing happen to make her “snap”, turning her crazy, when she was a child. When the E string snaps, it will effect the others because it has the highest tension of the strings, and because of this it can change the tone of all the others. So when Euros snapped, the rest of them, Mycroft, Sherlock, and Sherrinford, were changed badly because of an incident having to do with her. It all makes sense now.

Originally posted by yourreactiongifs

Originally posted by benedictc