Tulisi (17), a pupil at St Hildas Collegiate School and the Otago No 1, won five of her seven games in the matchplay competition at Nelson.
She was also prominent last year, when she played No 2 for Otago and had 4 wins from the seven games.
Otago finished in bottom position in the competition for the fourth consecutive year.
It lost the play-off for the wooden spoon to Canterbury.
Tulisi grew up in Christchurch and played for the Canterbury women's team for two years.
She came to Dunedin last year to train with New Zealand high performance coach Shelley Duncan.
She was a member of the New Zealand high performance squad last year and has competed in two tournaments in Australia with the squad.
"Monica made schoolwork her priority this year and I agree with that," Duncan said.
"She has the potential to play for New Zealand but needs the time commitment to do that."
Duncan hopes that Tulisi opts to study at the University of Otago next year and stay in the province.
"It would be wonderful for Otago women's golf to have a player of Monica's ability stay in Otago," Duncan said.
"It is a privilege to have her in the district and have the opportunity to work with a high-calibre golfer."
Golf is the main sport for the Tulisi family. Monica's mother, Philippa, plays for the Shirley club and her father, Charlie, for Waimairi, in Christchurch. Sister Nellie is No 3 in the Canterbury team.
Tulisi puts time into her golf and spends up to 16 hours on the greens each week.
"I'm not better at one part of my game," she said.
"I just try to be consistent with my driving and putting."
The player who has impressed her the most in her six years of golf has been former New Zealand representative Sue Hamilton.
