I am affraid that Bijan is correct is saying that your characters look great, but are a little dry in their special abilites.
Most of them are starting equipment, and spaces or adventure cards they can ignore.
Make a Unique ability first. Then see what character would work for that.
Spartian, has starting equipment, restrictions, and an ability that only works if he is killed?
What about this. The spartian has remarkable defence. He may roll for his armour "before" battle takes place. If it is successfull he may if he wishes make the battle a stand-off: If he then chooses to fight, he does not loose a life because he armour was already successful.
Then make a few subsiquent smaller abilites that round him out.
Skip the starting equipment abilites. Make room for more interesting stuff.
If the king were walking about like any other adventurer, without and entrouage, I'd simply whack him as soon as possible and take the "Crown" so to speak. Aside for that, if he was killed off, who's running the land? No, the King as an adventurer simply wouldn't happen.
Feel free to make better suggestions, I'm very open minded and I don't claim that these new characters are extremely balanced or have creative unique abilities. Don't hesitate, much appreciated.