"She took another of my sons."
Strengths: Leadership, Organization, Stoicism
Weaknesses: Tact, Humility, Empathy
First Appearance: LIAB 12
He has popped twenty-three sons and daughters. Among them Victor (his first son), Lustrius (his third son, probably an Heir who Slately thought was destined to be king), Titas, Forthewin, Wonderloaf, Ansom, Ossomer, and Tramennis (specifically not an Heir).
Slately claims that the magic of signamancy has changed his appearance over time, turning him short and fat to reflect his sedentary lifestyle. During his 3000 turns of kingship he has only seen a battle once and that from a heavily guarded turret. Again, signamancy is meant to reflect the character or personality of a unit as well as its rank.
After the defeat at Gobwin Knob, King Slately approached some sides, including Haggar, and tried to persuade them to join the second Royal Crown Coalition. He may have approached Jitterati and Carport, but if so, his efforts failed.
Since his first references and early appearances, Slately has begun to show serious character depth and even development. He seems struck by the loss of his sons and to actually care for them. He originally disapproved of Tramennis because of his signamancy but has since revised his opinion. Finally he approached Don King to request a loan to appoint Tramennis as heir. He admitted his failings and his own lack of the royal ideals that he constantly blustered about and craved a chance to finally honor his sons and their sacrifice. He hopes to save his son Tramennis and perhaps die leaving him the kingdom.
Real World References
The name of the faction, Jetstone, seems to be a portmanteau of the names of the Hanna-Barbera cartoons The Jetsons and The Flintstones. King Slately's name is an amalgamation of the names of the bosses on the two shows, Mr. Spacely (Jetsons) and Mr. Slate (Flintstones).
King Slately's appearance is based on the King of Hearts and King of Diamonds from a playing card deck. Slately's coloring and design are closer to the traditional King of Hearts, but his mustache only appears on the King of Diamonds.
During the Siege of Spacerock, Prince Tramennis says that Slately must be evacuated. His response is a quote from Grand Moff Tarkin in Star Wars: A New Hope... "Evacuate? In our moment of triumph? I think you overestimate their chances."