Mariella Montoni Scofield, a Brazil native who’s lived in New Canaan for eight years, wants her daughter to be tough. An 8-year-old who soon will enter the fourth grade at South School, Gabriella Scofield plays softball and swims with the New Canaan YMCA Caimans, “but I want her to do this,” her mom said. “I want my daughter to be tough and it’s a sport that makes you tough,” Montoni Scofield said. “You have to be tough and fast and you have to think ahead … I want her to learn so she can play with her brother and friends. And to stand up for herself.