Mark Twain
- Mark Twain is a human in the Hearts of Steel portion of the Generation 1 continuity family.

Mark Twain (November 30, 1835 — April 21, 1910) was the pen name of Samuel Clemens, a satirist known for his wit, his travelings, and writing Adventures of Huckleberry Finn, which many consider to be the Great American Novel, and The Adventures of Tom Sawyer.
Around 1867, he fought Ravage.
Fiction
Evolutions: Hearts of Steel continuity

While living in San Francisco, Mark Twain befriended other writers of his day, such as Jules Verne. At great expense, Mark Twain hired a ferry to take him and Verne out into the middle of San Francisco Bay to witness Tobias Muldoon's new invention, the "sub-marine." However, a technical mishap plunged the sub-marine to the bottom of the bay, a misfortune that brought laughter from Twain, Verne, and the ferry's skipper. Hearts of Steel, part 1
While at the estate of Muldoon's investor, Merriweather Stanford, Muldoon suddenly returned, in pursuit by the Decepticon Ravage. Due to Muldoon's bravery, he was able to shepherd everyone out of the house. Twain, in the meantime, had intentionally left a gas leak. Tossing his cigar into the house, it exploded, sending a singed Ravage off into the distance. Hearts of Steel, Part 3
Ultimately, Mark Twain teamed up with Muldoon, Stanford and his daughter, John Henry, and the Autobots to defeat the Decepticons and their impressive locomotive engineering feat, the Astrotrain. Hearts of Steel, Part 4

