Chulainn is a strong guy, but that makes him stubborn. He's got a small ego and is easily offended if people like Godun decide to question his authority. He is energetic, and raises his voice as a means to gain control in conversation.

Chulainn speaks as if he's trying to prove something, almost trying too hard to sound tough. although he is tough, it doesn't come across in his personality. He is quite young, around early 30s. His voice is not deep like Godun's voice, but the kind of deep you'd expect from an athletic adult male.