The Australian actor, who plays Jason Stackhouse in the HBO vampire television series, said that rumours of jealousy among him and his fellow leading men are not true because they are all "top blokes".
Kwanten told Men's Health magazine: "Surprisingly, there's no [rivalry] at all. They're all just top blokes and there hasn't and never will be any animosity between us. We're very much a unit."
He also said that he believes his character appeals to women because "he's very comfortable in his skin".
Kwanten continued: "I think from a female perspective, that kind of audacity or confidence can be sexy. Jason has been shot at, raped and danced around in his underwear wearing a Laura Bush mask. The fact that he is still standing there is kind of... intriguing."
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Kwanten said that he stops fame getting to his head by trying "to live in a little bubble", adding: "It's an Australian and a British thing not to take things too seriously. It's fantastic that [True Blood is] a success, but you need to keep a hunger and an ambition to... want more."
Describing True Blood as a "great show", the actor said that he enjoys his job because he works hard for six months of the year and spends the other six satisfying "whatever creative urges" he has. "It's a great position," he said, "especially for a single guy like me."
Kwanten recently promised that fans will see Jason grow up this season, adding that he loves the new direction his character is taking.
Watch a clip from True Blood below: