Bane was a large, incredibly muscular Herculean bald man, with many scars on his scalp. He wore a breathing mask that masked his jaw, mouth, nose and the top and back of his head. He was also wearing a brown shearling jacket with a military vest underneath, black combat pants and boots. His voice was also very deep - whether this was his real voice or an effect of the mask was left open. In addition, Bane was wearing a long-sleeved black shirt during his first appearance in the plane.

According to Alfred Pennyworth, Bane was fueled by rage and anger stemming from his harsh upbringing in the Pit. Training with the League appeared to refine this into something more focused, though he was (incorrectly) speculated that to have been excommunicated from it due to his anger. He himself also noted that he had been "born is the shadows", possibly indicating a nihilistic outlook on the world. John Daggett referred to Bane as evil, with him concurring but referring to himself as "necessary evil".

In fact, Bane was a cold, ruthless man, fully prepared to slaughter millions like Ra's al Ghul before him, and to kill people with his bare hands regardless of terrified bystanders. He was indeed ruthless in his operations, often killing those who failed him or proved useless (as in the case of the two men who had kidnapped Commissioner Gordon, and John Daggett after his failed takeover of Wayne Enterprises). He was ready to resort to violence when he deemed it necessary, as he demonstrated by brutally neutralizing the security guards at the Gotham Stock Exchange, who forced him to unmask himself to maintain the element of surprise. He also showed his cool against Batman in their first confrontation, aligning himself with Bruce's tactics and using his opponent's insecurities against him. However, he couldn't maintain this attitude when his mask was broken in their last fight, eventually losing focus due to the pain he was feeling.

Although expelled from the League of Shadows, Bane fully adhered to the organization's beliefs and ideals, having agreed to join the League and lead the takeover of Gotham. Nevertheless, his time in prison affected him greatly, to the point where he sought to put Gotham through the same kind of ordeal he and the inmates had to endure. He also expressed his intention to fulfill the "destiny of Ra's al Ghul", despite the fact that the latter was the man who held a grudge against him and excommunicated him from the League. Bane also demanded absolute loyalty from his peers and was perfectly willing to kill some of them to achieve his goals, sometimes even with their consent as in the case of the henchman he sacrificed during the plane crash.

Abilities Bane is shown to be a capable close range fighter in the Pit before being trained by the League of Shadows. During his fights with Batman, his abilities honed over the years are shown. He uses his brute strength and ferocity to gain an advantage over his opponents. He can snap necks and crush windpipes with ease. He can think and act quickly in the moment for whatever the situation may require. Bane also has a mask that administers anesthetic gas through tubes into his body which holds the pain from physical injury at bay. However, the mask is also a weakness if it's damaged as the pain is unleashed

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