Why would A Future King become A Adventurer?, and even if he did why be A Thief? and why would A Future King only have A Int of 11 and A Wis of 9?

[Blue Orange]

Or it could be A Female Noble whose A Magic User that wants to marry my characters younger brother and because she has access to The Spell Charm Person, which she could use on my characters younger brother, and if it works my characters younger brother would be the official ruler but in truth his wife would be the ruler

Your game is your game, but a first-level spell strikes me as the kind of thing nobility would have guards against, unless the setting is very low-magic.