is dinklage one of the main characters?
He is a prominent point of view character in the series.
Tyrion Lannister
He is a prominent point of view character in the series, having the most viewpoint chapters (49 chapters) in the first five published novels. 
name of the dwarf in game of thrones Tyrion Lannister. what's his name in real life? Peter Hayden Dinklage. what is his height? UNANSWERABLE what are the names of the other characters in the show you mentioned earlier? Lord Eddard "Ned" Stark , Catelyn, Sanasa, Robb, Arya, Bran, Rickon, Jon Snow, Samwell Tarly, Jeor Mormont, Gilly, Tormund Giantsbane , Ygritte and others. on which channel did this show air? HBO. what is its full form? Home Box Office.
wiki:8195616
Tyrion Lannister [SEP] Introduction
Tyrion Lannister, also known by the nickname the Halfman or the Imp and later by the alias Hugor Hill, is a fictional character in the "A Song of Ice and Fire" series of epic fantasy novels by American author George R. R. Martin, and its television adaptation "Game of Thrones". He is a prominent point of view character in the series, having the most viewpoint chapters (49 chapters) in the first five published novels. Based on an idea that came to Martin while writing the 1981 novel "Windhaven", Tyrion has been called one of the author's finest creations and most popular characters by "The New York Times".