I apologize, I missed understood.
"He WAS cool person. Angerness is rare in his personality. In fact, I have never seen him in angry mood. A smile is always on his face when he talks with anyone."
When I saw the word WAS which is past tense, I figured he is NO LONGER cool person.
Sorry for the misunderstanding.
Hehe. Sometimes It happen. Nothing to worry but try to be careful from the next time 😉.