Relationship core: 3 points.
Arthas remembers the emotions associated with his horse, Invincible. He will know a vague association with horses but not that his feelings are directly attached to one. He is haunted by the knowledge that his failure directly led to a horrible outcome.

Relationship core: 2 points.
The feelings associated with the people of Lordaeron. Arthas knows that there was something that he loved and treasured because it was his responsibility, but he did something terrible to it.

Paladin training: 3 points.
Arthas started later than most but underwent harsh training, first under the dwarven warrior, Muradin Bronzebeard, and then with Uther the Lightbringer. He developed skills with one- and two-handed swords, maces, and shields. He also learned meditation and about the Holy Light.

Noble upbringing: 2 points.
He does not remember that he was the Crown Prince but knows vaguely that he lived a very privileged lifestyle. He has a tendency to see himself as superior because, as far as he knows, he's of a higher class than most people.