He is monotone for the most part and his replies are mainly grunts or stunted speech. However the key to this is in the delivery of them as emotion slips through. Lines will be below 100 but at the end of his character arc he will deliver an emotional speech with no trace of his Neanderthal-like speech pattern.
Briarheart = An exalted living weapon with no will or emotion other than vengeance of his people.However, Roule remembers and feels more than he lets on. A rulebreaker who kept to himself, he was always a daunting teenager to young Cael. When they were adults he was a thoughtful and loyal warrior who could be relied on, but was even less talkative than Jakkal. He made a sacrifice larger than all of them in the name of vengeance, just when Cael was noticing something develop between the austere warrior and their city spy. Whatever that was, it made everything complicated and cost them their Hagraven. Roule is now Caels weapon of mass destruction and invaluable prowess, but his story is a reminder to the Chieftain of what happens when control is lost.