He really is the proverbial iron fist in the velvet glove and having that threat, fully engaged and ready to go, lurking in the midfield, must be a nightmare for the opposition.
His first-half try was set up by Bryn Hall's scorching run from a lineout but it was the big No.12 who helped to create the space through which the No.9 exploded. He attracts defenders as a magnet does iron filings.
Hall, who enjoyed a good starting debut in place of Weepu, was brought down a metre from the line and it was Nonu, in combination with Steven Luatua, who did the rest.
Elsewhere, Nonu worked hard settling a backline led by a slightly under-par Simon Hickey. The 20-year-old was probably due for a reality check after a promising start but in Nonu the Blues had the perfect Mr Fixit.
Jackson Willison looked good at centre and George Moala did well after his shift from No.13 to the left wing. Charles Piutau scored a try he had no right to, thanks to his individual brilliance.
The finish to the game was a bit untidy overall but there were no big breaks by the Highlanders. Last weekend the Cheetahs ran through the Blues' outside channels too easily; this time the defence was sound.
The Blues' backs, with Nonu to the fore, are starting to look settled and increasingly dangerous and that will be a serious worry for all of their opponents.