Sin'chume the Scout is his full designation, although he's been known to answer to Sinch or Sin. He was already an experienced scout by the time the Darkspears settled in Durotan. Aiding his people throughout there tireless exodus. Now that his people have a new home, he found himself to be less needed and offered his services to the new Horde.
Once enlisted he was called to use his scouting abilities once again. The new Horde was scattered yet entrenched throughout Azeroth and needed a massager who could deliver swiftly and often unnoticed. With various areas on the outbreak of a renewed war, Sin'chume often had aid in the defenses shortly after delivering a communications. He eventually was promoted to the rank of Stone Guard and had fought on various fronts both official and not.
After helping the Horde overthrow a false warchief, he soon disappeared. Rexxar delivered Sin'chume's last known message to Sun Rock Retreat. Rumor has it that he was working with Rexar on some secret assignment which he suddenly had to abort. A shadow hunter of his tribe said that Sin'chume had gone to find the whereabouts of the Winterax tribe who have also recently disappeared.