faust (guilty gear)
A character from the Guilty Gear series, Faust was a skilled surgeon who became a deranged killer after the death of a young girl that was in his care. However, he learned that the girl's death was not his fault (in fact, the work of a larger conspiracy) and became a wandering doctor to atone for his crimes.
He is known for his lanky appearance (282 cm/9'3", 55 kg/121 lbs), cartoonish behavior and abilities, using a giant scalpel as a weapon and the paper bag he wears on his head.
Although never explicitly stated, it is heavily implied that Faust is the reformed identity of the character Dr. Baldhead from the first game in the series, as the two share the same physical description, background and fighting style.