Neri was always extremely loyal to Michael. The only time he may have screwed up in Michael's eyes was when he went along with Vincent in whacking Zasa. Even then when Michael vent about it he vent to Connie, Vincent and ...Neri. This shows that Neri and Michael are so close that Michael is able to express his thoughts to someone outside of the family.

"Io sono stanco, sono imbigliato, and I wan't everyone here to know, there ain't gonna be no trouble from me..Don Corleone..Cicc' a port!"

"I stood in the courtroom like a fool."

"I am Constanza: Lord of the idiots."