Fifita, 26, who is the older brother of New South Wales and Kangaroos star Andrew, joins from New South Wales Cup side North Sydney Bears and will link up with his new teammates when pre-season begins on 18 November.
“He’s trying to follow a similar path as his brother into the NRL, and he certainly has the same physical attributes as Andrew,” said Demetriou.
“He wants to come up here and do really well, and hopefully open up some doors for himself into the NRL.
“He’s a prop or second-rower who is very strong, carries the ball well, and regularly dents the line.
“It’s a big change for Latu, and he’ll need to get himself physically and mentally ready, but I’m in no doubt whatsoever that he’s going to be a great success for us.
“I’m really excited that he’s joining the Pride and our fans can expect to see a guy who is determined to help us achieve our goals for next season.”
Demetriou said he first heard about Fifita when former New South Wales Origin star Scott Hill, who is Fifita’s manager, came up to help mentor the Pride players last season.
“Scott explained that Latu is determined to further his career and sees the Pride as the perfect place for him to achieve that,” said Demetriou.
“I think that’s a great compliment to everyone associated with the Club that we can attract these higher-profile players to Barlow Park.”
Fifita, who is 190cm tall and weighs 115kg, is a Balmain junior and has also played NSW Cup for Western Suburbs Magpies.
Demetriou also revealed that he had locked in other key forwards for his side’s 2014 Intrust Super Cup tilt, including Alex Starmer, Aidan Smith, Ben Spina, and Noel Underwood.
“As soon as last season finished, I made it a priority to make sure these boys were ready to go around again next year,” he said.
“They’re outstanding leaders, as well as footballers, and set a great example to the other lads.
“They’re also all very popular with the Pride fans, and it’s great to secure them for 2014.”
Pride’s Intrust Super Cup squad will start preparations for next season when they meet at an induction day in Cairns on 16 November, before officially starting pre-season training on 18 November.