Is this who could STOP Simone Biles? Meet Rebeca Andrade - the Brazilian gymnastics icon who 'scares' Biles most ahead of their Olympic rematch

While Simone Biles has isolated herself in a league of her own, even the most decorated Olympic gymnast acknowledges her toughest of competitions.

After losing the vault in last year's world championships to the rival Biles says 'scares me most,' she mimed removing a crown from her head and placing it on Brazil's Rebeca Andrade.

However, the crown's placement could again be determined when the American living legend and the Brazilian icon lock horns in the all-arounds on Thursday at Paris' Bercy Arena.

Although reigning all-around gold medalist Suni Lee will be on hand, the result of last year's competition and Biles' return to the Olympic spotlight - which has already struck gold - leaves no room for debating the protagonists come Thursday.

Here, DailyMail.com looks into Andrade's career and how she could be the biggest threat to Biles' epic Olympic run.

Born on May 8, 1999, the Guarulhos, Sao Paulo native grew up with seven siblings. Andrade picked up gymnastics at the age of four after her aunt took her to the facility where she worked.

Rebe's mother cleaned houses and walked to work to provide for their family and pay for her gymnastics training.

At nine, Andrade moved to train in Curitiba before taking her talents to Rio de Janeiro to train with Flamengo the following year. In 2012, she began her international career and the rest was history.

Andrade's talent brought the vibrant nation its first Olympic gold medal in artistic gymnastics. She is also the second Brazilian to bring home gold at the world championships.

Andrade made her Olympic debut in Tokyo and scored a gold in vault and silver in all-around competition. Earlier this week, she and her team earned bronze medals as Biles and the Americans won the team event.

Furthermore, Andrade holds three golds, four silvers, and two bronzes in the world championships. She also has two golds and two silvers in the Pan American Games and four golds and two silvers in the Pan American Championships. 

When Biles and met at the world championships, they finished 1-2 in everything except uneven bars and beam. The bars were won by China and Algeria. Meanwhile, Biles took gold in beam while Andrade finished with the bronze.

Nonetheless, a friendly rivalry between them was born from their proximity in rankings. 

Biles bagged four golds to Andrade's one. Still, it was the Brazilian star's win in vault that makes their rematch in Paris one of the most anticipated meetings in these Olympics. 

While the numbers highly and unsurprisingly favor Biles, having lost to Andrade before has done enough for her to acknowledge the challenge. 

The American's 38 medals from Olympic and worlds competition stacks high compared to Andrade's 12. However, Brazil's icon remains confident while relishing in the opportunity. 

'It's about doing my best,' Andrade told AFP. 'I hope she does, too, that she does the best, because it's an honor to be able to compete alongside her.' 

Despite being labeled rivals in their sport, the competitors share the utmost respect for each other. At the 2018 world championships, Biles encouraged Andrade as she recovered from the second of what would be three ACL tears. 

Andrade said Biles 'spoke from the heart' then and cemented a 'relationship of admiration.' 

As for the figurative passing of the crown last year, Andrade did not question the respectful intent behind Biles' gesture. 

'I saw it as something genuine, spontaneous, to recognize the position she has in gymnastics in the world,' she told Brazilian Marie Claire.