"As a French citizen, I was happy to see him at a French club," says Jouanneaux. "That was a big success for the French championship and also the possibility to see French stadiums and teams.
"On the other hand, this move was a little disappointing. Everybody wondered, could his relationship with the 'Pablitos' continue?"
Castel's transfer came back to haunt the fictional Barca team in edition eight after he powered PSG to victory in the CEVA Cup, a made up European competition, beating the Catalan club in the final.
Castel fans were outraged. The character had never won the CEVA Cup with Barca and now he had extinguished his former club's hopes.
"The whole affair led to outrage among followers of the series, who were devastated by Raymond Reding and Françoise Hugues' decision to transfer Eric Castel to Paris Saint-Germain," said Barca's official website.
"Not only that, but to also have him participate in the defeat of Barça in the most important club competition in Europe."
Having spent issues eight and nine in the French capital, and after Barca lowered their financial demands, Castel made an emotional return to the Catalan club.
His comeback was the stuff of dreams for young Barca and Castel fans. In 1988, four years after leaving the Nou Camp, Castel finally fired the club to CEVA Cup success.
"I liked so much the moment when Barça wins the final of CEVA with a penalty from Eric in the 12th album 12," says Garcia.
"In the 1980s Barça had never won the Champions League. It was a great time to be a Barca supporter.
"Before Barça became the great Barça that it is today, a Belgian illustrator took a chance on this club by making the hero of his comic, a fictional French footballer called Eric Castel, a player for the team.
"Castel quickly became an idol for many young readers in the '80s, all over the world."
In reality Barca and PSG are both attempting to conquer Europe, with Wednesday's second leg tie in Barcelona delicately poised after the first leg in Paris finished 2-2.
If he were still around today, who would Castel want to advance to the semfinals?
"I believe that Eric is a Barça supporter," responds Garcia. "He is a real cule."