Todd (16), a pupil at Columba College, proved her ability by winning medals in three different weight categories - 65kg class, 67kg class and 72kg class.
She was the most successful female wrestler at the championships and won the trophy for being the best female fighter.
Todd, the New Zealand champion in her age group, has been wrestling since the age of 8 and has won several national titles.
Her most significant performance was to win a gold medal in the girls under-16 63kg class at the Down Under Games on the Gold Coast last September.
Wrestlers from the United States, Australia and New Zealand participated in the event.
The South Island championships were dominated by the 28 wrestlers from Dunedin's Combat Sports School who won 29 medals - 11 gold, 11 silver and 7 bronze.
Combat Sports won the most medals and was followed by Taieri 25, South Canterbury 24, Rangiora 9 and Crichton Cobbers (Christchurch) 7.
The cup for first placings was won by South Canterbury with 18, followed by Combat Sports 11 and Taieri 10.
Ricky Welsford (Taieri) won three gold medals in the freestyle class - 60kg and 66kg in the junior men's grade and 60kg when he moved up to the senior men's section.
Welsford also won the junior and senior titles in the Greco-Roman style in the 60kg class.
His brother, Craig, won the 50kg class in freestyle wrestling.
Bryce Neaves won gold medals in the under 32kg section and the 35kg division in the boys aged 10-13 competition.
The other notable Otago performance at the championships came from Bayfield High School pupil Florian Rades (17), who won the silver medal in the 84kg class in the boys aged 16 and 17 grade.
The bout was won by Riki Swete (South Canterbury).
The four wrestlers going to the Down Under Games from Otago are Florian Rades (Combat Sports) and Taieri's Zac Harrington, Josh Pendreigh and Ricky Welsford.
Todd was selected but declined.
The two Otago wrestlers going to the Commonwealth Youth Games in India in October are Nico Bloemsaat (Combat Sports) and Ricky Welsford.
About 200 wrestlers are expected to compete at the national championships at Mosgiel on July 25 and 26.
Other Otago gold medallists from the South Island championships: Corey Campbell (Taieri) boys under-10 22kg, Zayne Ngatae (Combat Sports) boys under-10 48kg, Derek Nyhof (Taieri) boys under-10 47kg, Faith McLean (Taieri) girls aged 10-13 32kg class, Macayla Moore (Taieri) girls aged 10-13 57kg class, Lee van der Lem (Combat Sports) boys aged 10-13 54kg, Campbell Checkett (Combat Sports) boys aged 10-13 85-100kg class, Hayden Bell (Combat Sports) senior 74kg class, Craig Miller (Combat Sports) men's 96kg class.
