She has lived without a right hand since birth, but she has never let it stop her doing things.
She spent two years recovering from a career-threatening broken foot, suffered just a year after winning gold at her first Paralympics.
But she worked her way back to career-best form.
So when New Zealand was plunged into Alert Level 4 just days before she was set to fly to Tokyo, it was just another obstacle.
The Dunedin Paralympian still plans to fly out of Auckland International Airport on Tuesday.
She has not yet finalised how she will get to Auckland to catch that flight.
But she is working through her options with her team, and while stressed, is confident of arriving in Japan as planned.
She will not be able to get to a track in her final days of preparation, but she is confident in the work she has done.
"I feel like at every corner it seems to be the harder option keeps coming up," Grimaldi (24) said.
"At the same time we were super lucky to have a full season and do lots of awesome jumps and to have a full winter block.
"It’s just this last week there’s another roadblock.
"Lots of athletes have lots of adversity. I feel like I’m one of those ones that seems to keep getting things thrown at them.
"But I hope we can take this in our stride as well and show we make the most of it."
Five years ago, Grimaldi jumped a personal best by 21cm of 5.62m with her last jump, winning a shock gold in the T47 long jump at Rio.
The situation is a little different this time.
She is no longer the barely-known 19-year-old just two years removed from Bayfield High School.
Grimaldi said she had grown physically and mentally, and had a much better idea of what she was doing.
She has been through one of the toughest periods any athlete could experience with her broken foot.
She came out of that with a silver medal at the 2019 world championships.
And last summer she, finally, broke the personal best she set in Rio — a mark she has since kept improving.
Grimaldi enters these Paralympics with a 5.91m jump to her name.
If she can pull out anything close to that, she should return to Dunedin with a second gold medal.
Even to be going has had an element of surreality to it — it was something Grimaldi said she would have not thought possible in the depths of her injury break.
But knowing her body was now capable of doing those jumps again gave her confidence.
"That was nearly five years of no PBs," she said.
"If you know what went on in those five years, that’s not too big of a deal. But that’s a long time to not see any improvements.
"To have it be such a big improvement just showed how hard we worked through the injury and how many stones we didn’t leave unturned.
"We went everywhere, we did everything, we took every piece of advice we could and we did it 100%.
"I think that’s how we managed to have such a great season this year."
Grimaldi will compete on Friday, September 3.
