The Human Torch is a fictional superhero appearing in American comic books published by Marvel Comics. The character is a founding member of the Fantastic Four. A similar, unrelated character of the same name and powers was created in 1939 by writer-artist Carl Burgos for Marvel Comics' predecessor company, Timely Comics.
Like the rest of the Fantastic Four, Jonathan "Johnny" Storm gained his powers on a spacecraft bombarded by cosmic rays. He can engulf his entire body in flames, fly, absorb fire harmlessly into his own body, and control any nearby fire by sheer force of will. "Flame on!" which the Torch customarily shouts when activating his full-body flame effect, has become his catchphrase.
Source: Wikipedia, "Human Torch", available under the CC-BY-SA License.