He may be the beast on the field but off it, Mtawarira is a gentle giant. Sure he has a deep baritone voice the late Barry White would be proud of but all-in-all he is an all-round nice guy.
Mtawarira anchors an impressive South African scrum and does not normally get an opportunity to have his name in the scoring column. However, in his team's second appearance at the World Cup against Fiji, he showed the crowd he knows his way to the try line.
Although Mtawarira was not going overboard with his try-scoring abilities.
"Obviously front rowers don't score too many tries, so it's always enjoyable.
"I was very fortunate that the ball was popped up and I was there at the right time."
It was Mtawarira's first World Cup try and only his second for his adoptive country. His first try was against Italy in June 2008.
The 30-cap veteran, who made his debut against Wales in 2008, is not too concerned about scoring tries. For him it is all about doing his job come scrum time.
South Africa are on track for a quarter-final berth against familiar foes Australia but they refuse to look further ahead of their Pool D clash with Namibia in Auckland on Thursday.
The Springboks emerged relatively unscathed from their bruising 49-3 win over Fiji in Wellington at the weekend and have veteran second row Victor Matfield close to fully fit.
Matfield did not take part in team training, opting for a light jog and stretching with the team's medical staff.
The Springboks' backs coach Dick Muir admitted Ireland's 15-6 upset win over the Wallabies at Eden Park and New Zealand's chopping and changing of their backline had surprised the Springboks camp.
"It's been interesting watching all the games," Muir said.
"We were surprised at some of those results. They've been good tough battles. Australia are a team we know, probably better than we'd know Ireland.
"We've been a little bit surprised with New Zealand, some of their selections, but we also know they've got a squad that's got a lot of versatile players.
"But we're going to worry about Namibia and get that under the belt. We've got plenty of time to assess those other sides [Australia and the All Blacks] when we get to that bridge."