The hero usually has an epic battle with a villan where he fights to the death for what he believes in.
The hero must suffer more than he deserves.
The hero must be doomed from the start, but bears no responsibility for possessing his flaw.
The hero must be noble in nature, but imperfect so that the audience can see themselves in him or her.
The hero must have discovered his fate by his own actions, not by things happening to him.
The hero must see and understand his doom, and that his fate was revealed by his own actions.
The hero's story should arouse fear and empathy.
The hero must be physically or spiritually wounded by his experiences, often resulting in his death.
Ideally, the hero should be a king or leader of men, so that his people experience his fall with him. This could also include a leader of a family, like Allie Fox in The Mosquito Coast.
The hero must be intelligent enough to have the opportunity to learn from his mistakes.
The hero must have a weakness, usually hubris, a subtle but irreversibly tragic form of pride.
The hero must be faced with a very serious decision.
The suffering of the hero must have meaning.
There may be supernatural involvement(Shakespeare's Julius Caesar, Caesar was warned of his death through Calphurnia's vision, Brutus was warned of his impending death by his evil spirit)
A tragic hero's story generally follows a sequence of "Great, Good, Flaw, Downfall."
The Shakespearean tragic hero must die at some point in the story, for example Macbeth. Shakespeare's characters illustrate that tragic heroes are neither fully good nor fully evil. Through the development of the plot a hero's flaws, rather than his quintessential goodness or evil, cause him to make a mistake which leads to his tragic downfall.
The hero of classical tragedies is almost universally male. Later tragedies (like Shakespeare's Antony and Cleopatra) introduced the female tragic hero. Feminine portrayals of the tragic hero are notable because they are rare.[3] Female protagonists in the Western literary tradition are generally portrayed as intrinsically good or intrinsically evil. The 'intrinsic' nature of traditional female characters' morality undermines the possibility for female characters' tragic mistakes or flaws to contribute to plot development as protagonists. Rather, these two-dimensional characters contribute as an outside force influencing the actions of the 'real' protagonists.

Killian
Hopkins
Killian Hopkins
Killo
Kill
Killy
Killer
Kg (pronounced as in the mesurement of wieght)
K Dog
Hoppo
Hopper
Hopscotch (my personal favourite)
Hoplegotch (when me and Lego are together)

Plato was a dirty fucker who liked the boys and have to write an essay about his work, i hate him.