Lucien Enjolras

Lan Wangji knows two of these signs. Later, he will have to ask someone or look up the third one. Still, following Galahad's gesture toward Claudius, who is clearly enjoying himself on a level completely inaccessible to either of them, softens his face with fondness, and he dutifully copies all three, once and then again to be certain he can remember for whenever it becomes relevant.