The empathy, though only mentioned like three times, is super-interesting to me and I'd like to see that play a bigger role in his character development, especially since it further differentiates him from his brother on a fundamental level - and because despite what anyone says, emotion and emotionalism are considered (feminine) weakness in our society. (Unless they're "MANLY" emotions like anger/rage, apathy or jealousy, of course.)
In this panel it's shown that his empathy is so sensitive that he can actually
identify and find specific people with it (in this case, Heater Delight).