Scorpion

Scorpion is arguably the most well known and iconic Mortal Kombat character in the entire series. He has appeared in every single game in the series and has been a playable character in all as well. What drives Scorpion to fight is his determination to avenge his clan who was slayed by Sub Zero. He is not inherently evil, however he joins the likes of Shao Kahn who promise the resurrection of his family and achieve vengeance on Sub Zero. An attack in which he has used in every game is his spear attack (which can be seen in the Mortal Kombat-Bush Gif to the left), is always accompanied by the taunt 'Get over here' or 'Come here.' 
His fatalities are:

Split Decision: Forward, Down, Forward, Y/Triangle
Neither Gate: Back, Forward, Back, A/X
Toasty: Down, Up, Up, Y/ Triangle (this requires the DLC of Scorpion's classic costume)