I guess Gardon is now in full adrenaline mode now.
I mean, he's eager to get his revenge on van Durce and the Emperor for blaming the defeat against the rebels.
He also planned on reconquering some of the fallen kingdoms, such as Lor and Isalmur or possibly more.
What I can see within him is potential, and I think he could be the next emperor.
Possibly, maybe.
But only time will tell...