Like Durin, Savoy, the King of the Western Lands, also held the title of Protector of the Nation, only his child, Zaiyigu, was a prince.
What's called wild ambition could be glimpsed from this trait.
However, at the banquet, he didn't seem to harbor such wild ambitions given his enthusiastic demeanor.
Come to think of it, it is rumored that the bastard who once pursued Alice was his half-brother from the same father. Those two had fought over the title of prince, both openly and in secret. Later, the bastard tried to scheme to win Alice's favor but ended up with his plan backfiring. The Yidale Family took off to the Great Wilderness, settling into Eternal Forge Fortress. They earned the merit of dragon-slaying and denounced this bastard's vile acts.
Losing a Great Merchant family and becoming enemies with the real power behind the Tri-Saint Society, so that young man lost his momentum—the stronger Durin became, the worse off he was.