I would tell him that his health problems are completely confidential and that I would not tell his wife. If the wife asked me, I would say to talk to your husband he will explain everything.
The nervous system is the most important body system and the heart is the most important muscle
Some examples of personality traits would be: kind, energetic, sociable, sympathetic, imaginative.
So you just have to figure out what kind applies to you (you can look up different ones)