Game of Thrones
HBO will air 'Game of Thrones' season 5 finale titled 'Mother's Mercy' on Sunday, 14 June, at 9pm.Facebook/Game of Thrones

With just few hours left for the finale of "Game of Thrones" season 5 titled "Mother's Mercy", fans are curious to know about the various surprises awaiting for them.

While speculations suggest several shocking incidents in the 10th episode, including Jon Snow's (Kit Harington) death, "A Song of Ice and Fire" author George RR Martin opened up about the characters he would love to see in the show.

Although the writer's list includes Lady Stoneheart and Jeyne Poole, the two characters who could be playing vital roles in upcoming sequels of the book are Loras Tyrell's elder brothers, Garlan and Willas.

"Loras is not the eldest son in the books. There are two older brothers, Willas and Garlan. I didn't just put them in for hoots and giggles, they have roles to play in the last two books, and they don't exist in the show," Geek quoted the author.

So it remains to be seen whether the creators of HBO series, David Benioff and DB Weiss, have any plans to introduce Tyrell siblings in the finale titled "Mother's Mercy".

However, the words of Martin does not bring any hope for these two characters as he wrote on his blog called Not A Blog, "There have been differences between the novels and the television show since the first episode of season one. And for just as long, I have been talking about the butterfly effect. Small changes lead to larger changes lead to huge changes."

"HBO is more than forty hours into the impossible and demanding task of adapting my lengthy (extremely) and complex (exceedingly) novels, with their layers of plots and subplots, their twists and contradictions and unreliable narrators, viewpoint shifts and ambiguities, and a cast of characters in the hundreds."

Nevertheless, the author revealed that "Game of Thrones" is not the only show which differs from its book adaption. "There has seldom been any TV series as faithful to its source material, by and large (if you doubt that, talk to the Harry Dresden fans, or readers of the Sookie Stackhouse novels, or the fans of the original Walking Dead comic books)," he wrote.