Valentina Shevchenko: ISTP
No one would mistake current UFC women's flyweight champion Valentina Shevchenko for anything but an ISTP. The women's flyweight queen is a private, enigmatic presence. While friendly and polite, she shares little to nothing about her personal life, except for openly showcasing her close relationship with her younger sister, Antonina Shevchenko.
As with most ISTPs, Shevchenko is poised under pressure while also exhibiting trademark stubbornness. In the octagon, she uses her distance management to frustrate her foes into coming forward, so she can lean back and counter them with check hooks and pull her leg away and throw non-committal low kicks, body kicks, and back-kicks.
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After conditioning her foes to these counters, which frustrate her opponents even more, she ducks under their reckless punches with a body lock and inside-trip. This is Shevchenko's game plan, and she never deviates from it, even when it doesn't work, such as when it led to her being outwrestled by Holly Holm. This is an element of her ISTP stubbornness.
Julianna Peña: ENFP
Julianna Peña is the UFC women's bantamweight champion, which very few people had given her a chance of becoming due to the seemingly insurmountable challenge that stood in her way at the time: defeating Amanda Nunes, arguably the greatest women’s fighter in history.
Like an ENFP, Peña trusts her intuition without fail, something she has displayed repeatedly, even in her fight with Nunes when she chose to stand and trade blows with 'The Lioness'. The reigning champion is outgoing and enthusiastic. Like the classic ENFP, Peña is prone to venturing beyond her comfort zone and exploring new avenues of life, as expressed by her desire to one day pursue standup comedy.
Amanda Nunes: ISTP
Former women's bantamweight champion and current women's featherweight champion Amanda Nunes is widely regarded as the greatest female fighter in MMA history.
She has defeated other legends of the sport, such as Holly Holm, Ronda Rousey, Valentina Shevchenko, Meisha Tate, and Cris Cyborg, most of whom were once world champions and one of whom is currently a world champion.
Much like her longtime rival Valentina Shevchenko, Nunes seems like an ISTP. While she is calm, she is prone to spontaneous bursts of energy. She also operates with more freedom, being one of the first openly gay fighters on the UFC roster.
Deiveson Figueiredo: ISTP
Current flyweight champion Deiveson Figueiredo is one of the scariest fighters in his division. He possesses fearsome knockout power and a deadly submission game with airtight chokes.
Figueiredo is likely an ISTP, having indulged in his creative exploration of different ideas and projects, which is best illustrated by the various jobs he's had throughout his life. To date, the reigning flyweight champion has been a sushi chef, hairdresser, and bricklayer, in addition to being a mixed martial artist. This is due to the ISTP's tendency to give in to their impulsive energy and commit to sudden changes in direction and ambition.