"This region - and the people in it - have been hugely supportive of me over the years. That is a massive part of why I want to play a ninth season with the side. I am fiercely loyal and have never been handed more of a reason to make a difference to the team."
Mystics coach Debbie Fuller said Latu, who was the most-accurate goal shooter (93.8 per cent) in this year's ANZ Championship, is a key signing for the team, bringing "experience, attacking prowess and accuracy" to the shooting end.
"She's a 'team first' player and has added something to her game every year," said Fuller.
"Cat's focus going forward is all about being a better player and enjoying the challenge."
Latu will likely pair up once again with Maria Tutaia in the shooting circle next season, with the Mystics expected to confirm the captain's signing, along with fellow Silver Fern Kayla Cullen next week. Teams must submit their final rosters for 2016 to the ANZ Championship office by August 28.
Mystics squad announced to date:
Temalisi Fakahokotau, Serena Guthrie, Cathrine Latu, Nadia Loveday and Sulu Tone-Fitzpatrick.