Rhalko

Rhalko is a recurring character in the sixth season. He is a Dothraki Khal. Rhalko is played by Andrei Claude.

In the books
In the A Song of Ice and Fire novels, none of the Dothraki have been named Rhalko as of A Dance of Dragons However, the storyline in which Rhalko is involved in the show will not appear in the books until the sixth book in the series, The Winds of Winter, which has not been released yet.