as for "being in a guarded castle" all his life, great responsibility was thrust on him at a very young age. A lot of the duties were handled by fordring (and subverted by a certain someone someone) but the burden of it lay on him. he didnt get to be a child and had to grow up quick.
he has a good head on his shoulders, is not TOO goody too shoes and see's things for what they are. Knows when to give trust and when to be weary.