Rodri fulfilled the dreams of Pep Guardiola and City's Abu Dhabi-based owners with the only goal in a tight 1-0 win over Inter Milan who defied expectations to push City all the way.
"I'm emotional, it's a dream come true. All these guys (the fans) around here waiting 20, 30, 40 years," Rodri told BT Sport.
"I've been here just four years but we deserve it. We were so close these last years but when you go to semi-finals, finals, finally God gives you this present... It's a dream for all of us."
He scored the winner in his 52nd start of the season, a mark of how important he is to Guardiola's City, building play alongside John Stones (29) and usually allowing a stellar attack to run riot.
But on Saturday it was his turn for the limelight as Kevin De Bruyne (31) exited his second straight Champions League final with an injury and the normally prolific Erling Haaland (22) was restricted to scraps by Inter's well-drilled defence.
With extra-time already looking like a possibility, Rodri was in the right place at the right time when Bernardo Silva's (28) cutback was deflected off course.
He strode onto the ball and with the calm which has characterised his midfield play all season coolly placed his shot past Andre Onana (27).
It was also redemption for a poor first-half performance in which he struggled with the pressure that Inter applied on him and was uncharacteristically sloppy in possession.
"I was not good in the first half. I was playing shit," admitted Rodri.
"This talks to the mentality - I just said to myself 'you have to overcome the situation' and in the end I score a goal. Unbelievable."
His fourth goal of the season in all competitions was just enough to see City through as Inter hit the bar through Federico Dimarco (25) and had Romelu Lukaku (30) waste a glorious chance to level late on.
But it was City and Rodri's day after falling short against Chelsea two years ago, the 70-million-euro midfielder a lesser figure in a star-studded team but still a symbol of the financial power of a unit which crowned an almost perfect season by winning the treble.
"I think we made history," said Rodri on winning the Premier League, FA Cup and now the Champions League.
"The good thing is that we want more. This project is to want more, more ambition."
