Smith, who played alongside Manu at the Highlanders until the former co-captain left in 2016 to play in Europe, says Manu's journey from diagnosis in October last year to a recovery and naming in the 'Ikale Tahi squad shows his strength of heart and mind.
"It just shows the character of the man," Smith said.
"He's a great guy on and off the field, great leader and great friend.