Mr. Freeze

Dr. Victor Fries (Fries is pronounced "freeze") was an accomplished scientist until a fatful accident at the lab.

Biogrophy
Victor Fries was experimenting one day on thirty degrees below tempuratures in his lab. The vat of subzero mists overreacted after Fries switched it on, and it exploded, consuming the lab with ice.

The ice had also consumed Victor's wife, Nora. Although they were both "iced", Victor somehow could survive. In an effort to rescue his wife, he constructed a suit which could keep him from inhaling the humidity and heat of summer. Calling himself Mr. Zero, he began to rob several banks to earn money to heal his dying wife. He was eventually thwarted by Batman and Robin, but struggled on.

After an alleged death, Fries made Gotham City believe he was dead. After waiting until Gotham adjusted to life without him, Fries rearranged his costume and returned, this time calling himself Mr. Freeze. To this day he struggles fighting Batman and Robin.