And it appears the latter had a key role to play in bringing the World Cup's highest scoring defender to the north west club.
"Every discussion we've had was very important in making me feel his confidence about my game. When I found out about this opportunity and what the manager wanted out of me I was happy".
Everton are aware that they would be cutting it close with respect to signing Rojo in the final stretch, but remain confident that there is still time to push through the deal.
BBC reports that Mina's arrival means Everton have spent more than £60m in the past two weeks following the initial £35m arrival of Brazilian winger Richarlison from Watford, a deal that could rise to £50m.
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The 25-year-old, who has won 14 caps for his country since 2014, links up with new Toffees boss Marco Silva at Goodison Park to become their fourth signing of the summer, and will wear number 20 for the club.
And speaking about his desires for his new side, Mina revealed he has sights set high. I have spoken a lot to the coach and I know his passion for Everton and determination to be successful.
It is not known whether Mina will line up against Wolves in their Premier League opener on Saturday.
Mina had always been linked with a move away from Barcelona this summer with the club's purchases of non-EU players in Malcom, Arthur and Arturo Vidal filling their quote per La Liga's rules. "This is why I am here", he told his club website.
"I can promise I will try my hardest and dedicate myself to my work and to trying to make things happen for Everton".