Stoic angel, naive, loyal, evolving, righteous, empathetic. He is very duty driven, and serious about his work and helping people and things. He's very connected and attached to the Winchesters although very upset with them at times. 

He doesn't understand romance very much, and so sometimes he'll do romantic gestures without understanding that they are romantical. He tends to get in peoples personal space without realizing it. 

He doesn't read situations very well.  