Engineer "Spark" Overgrind

Engineer "Spark" Overgrind is a gnome who wanders the beach near Odesyus' Landing in the draenei starting zone of Azuremyst Isle. He is the emissary of High Tinker Mekkatorque, traveling along with Admiral Odesyus. He appears to have a fondness for collecting seashells.

Biography
Admiral Odesyus discovers that there is a traitor in his midst, someone who has sold out his fleet, and the draenei people, to the Venture Co. The Admiral calls upon a draenei adventurer to discover the truth of who exactly had betrayed him. After creating a disguise to pass off as a tree in order to eavesdrop on a secret meeting between the traitor and Geezle, the leader of the Venture Co. expedition. It is revealed that "Spark" is in fact the traitor, and the Admiral calls upon the adventurer to kill him and discover who gave him his orders. The orders turned out to be from Kael'thas Sunstrider.

Odesyus and several other members of his crew had known Spark for years. After Spark was revealed to have been working with the Burning Legion against the Alliance, it was noted that they could never have imagined that Spark was a traitor (but also that they never liked him, either).

Wandering around the beach
While Engineer "Spark" Overgrind wanders around the beach, collecting seashells, he says 1 out of 6 random quotes, followed by 1 out of 3 random emotes, when he finds a shell:


 * say
 * say
 * say
 * say
 * say
 * say


 * emote
 * emote
 * emote

Conversation with Geezle
During the quest Tree's Company, the following dialogue takes place, the first mention of his affiliation:


 * emote
 * say
 * say
 * say
 * say
 * say
 * say
 * say

Confrontation with the adventurer
The following dialogue takes place when the player confronts Overgrind in the quest Show Gnomercy:

Can't you see that I'm busy?


 * emote
 * say
 * say
 * say
 * say

The Traitor's Communication
The message from Kael'thas found after killing Overgrind reads: