Malach

Malach was a Klingon male who reached the rank of General shortly before the Dominion War.

History
Malach was born to a noble Klingon House within the Klingon Empire. Early in his youth, he would be sent Emperor Kahless Military City. There, he met Worf, Son of Mogh and forged a friendship with him that culminated in a bond that was witnessed that mark the two as blood brothers.

Background
He was noted for his intellect and the fact that he did not respond as aggressively as normal Klingons would do so when challenged.

(DS9 novel: Vengeance)