Just wondering... where is Arima and why kaneki copied his style?
Ah... I agree, it gave off calm before the storm feeling.
during the manga, Kaneki copied characteristics of several people, among them include Touka, Tsukyama, Sachi, Rize, Yamori and others. is extremely strange to be surprised in the manga to know that he copied someone.
remember, according to his profile psychological, it lacks individuality and has great empathy.
I'm not sure how much he is copying Arima in case of personality... Arima doesn't seem like someone with such secrets as Ken and his smile is pretty sincere. Eto on the other hand has secrets, smiles, plans and wicked personality...