Rise of the Dark Sun
Sumra looks very much like young child standing only 3’2" and weighting only 28lbs. He uses this to his advantage to strangle his prey to death.
Sumra is least likely person you’d think be a skilled assassin, but he is and loves his work. Ended up on ship after a botched job left he out of luck with an employer. Luckily his mark, Morganiza, let him join his crew.