Reina made the headlines across several different newspapers in the UK when excerpts from his autobiography told of shouting matches with Jamie Carragher and why he thought the club were right to get rid of ex-boss Rafa Benitez.
However, Aldridge pointed out that the book also illustrates just how much Reina loves Liverpool and why he stayed despite offers from Barclays Premier League rival Arsenal.
"He is a massive character - the kind of which you don't get many of in football these days," Aldridge told Liverpoolfc.tv.
"We all saw the video of him leading the celebrations after Spain had won the World Cup, and that sums up his character. His teammates love him, and he must be fantastic to have in and around the dressing room. I'm yet to see a player who doesn't speak very highly of him.
"On the pitch, too, he is a leader. You see him now, and he organises and talks to his defence. There aren't many people who will shout at Jamie Carragher on a pitch, but Pepe will!
"Liverpool are lucky to have him.
"He might not be a local lad, and he might not have grown up with the club, but he cares about Liverpool. That comes across every time you hear him speak. He is a Spanish Scouser."
Reina became the quickest goalkeeper in Liverpool history to keep a half century of clean sheets last season and it is a feat which Aldridge reluctantly concedes ranks him higher than his ex-team-mate Bruce Grobbelaar on the list of all-time greats.
"I've said this before, but for me he is second only to Ray Clemence in terms of the club's greatest ever goalkeepers," Aldridge said.
"It takes a lot for me to say that, too, as I played alongside Bruce Grobbelaar, who was absolutely fantastic, and won all kinds with the club.
"But Pepe is magnificent, and for me even better than Brucie."
Reina almost joined Arsenal after the Gunners put in a £20 million bid for his services back in 2010.