The 33-year-old ended his ten-year association with Tottenham, fulfilling his promise to stay with the club until they won a trophy.
Son has since signed for MLS side LAFC, where he will join up with former teammate, World Cup-winning goalkeeper Lloris, 38.
He told reporters on Friday: "It's amazing to be together again. It's a new chapter with a different jersey, but with the same ambition, same motivation.
"He's a big competitor. He was the captain of Spurs for the last two years. He's the captain of his national team.
"He spent 10 years at Spurs, he did everything that he could, he won the Europa League last season. He achieved so much in the Premier League, in terms of stats, in terms of image, he's well respected all around the world. I understand that you arrive at one stage in your career, you need a new target, a new objective.
"Seeing him coming to the MLS, it's great, you know, for the league, great for the city, great for the club, also great for our team because he's a kind of example. There's plenty of things to learn from him ... so I expect him to have a really big impact."