Bronk is quite a competitive and adamant person who takes pleasure in other people's embarrassment, even if it is his own friends; much like the times when he makes Yuma get worked up and challenge events which he can't win, which ends up in Bronk and the other classmates laughing.

He is also a strong-willed person who doesn't like to show his emotions, like when he obtained the broken piece of Yuma's pendant and said he just "came across it", when Shark had clearly kicked it into a small forest near their school (in the English dub, he flatly states that he went looking for it). Despite this, he seems to have friendly rivalry with Yuma, as he tends to be on Yuma's side and though doesn't always believe that he'll be able to turn around his Duels, he supports Yuma most of the time.

Bronk seems to have an incredibly strong will. When Yuma was possessed by Number 96, he used Yuma's "Number 39: Utopia" to save him, and was quickly able to shake off the corrupting effect that strikes most Numbers users via the Emperor's Key).

He also developed a crush on Rio Kastle not long after meeting her, and this has continued to persist, unlike the initial attractions from the other students. He also shows more control of himself around her as the series progressed.