Hercule Poirot (Murder on the Orient Express)

Impeccably dressed and famously proud of his mustache, Hercule Poirot approaches every mystery with order, precision, and what he calls the “little grey cells.”

While others chase physical clues, Poirot studies people — motives, lies, and tiny contradictions that reveal the truth.

His cases often end the same way: a room full of suspects, a perfectly timed explanation, and a killer exposed through pure psychological deduction.

Fans of Sherlock Holmes argue logic beats intuition.

Poirot supporters say understanding human nature is the real detective skill.