Helena Crevar was born in January 2007 in Las Vegas, Nevada, USA. Her martial arts journey began at the age of three with Kajukenbo, a Hawaiian martial art blending striking and grappling techniques. By eight years old, she had already earned her junior black belt, demonstrating exceptional discipline and talent. Alongside martial arts, Crevar actively engaged in diverse athletic pursuits, including ballroom dance, ballet, basketball, and swimming. Her early exposure to structured athletic training led her to begin strength and conditioning at a local gym at age eight. There, the gym owner, a Brazilian Jiu-Jitsu enthusiast, recognized her potential and encouraged her to explore BJJ.

Early Training and Development

Initially training under various instructors, Crevar eventually joined the renowned kids' program led by Hector Vasquez. Under Vasquez's mentorship, she rapidly progressed, earning her blue belt and marking a significant milestone in her competitive journey.

Move to New Wave and Brown Belt Promotion

At age 15, Crevar relocated to Austin, Texas, to train with esteemed grappling coach John Danaher at New Wave. Under Danaher's expert guidance, she quickly emerged as a standout competitor in both gi and no-gi formats. Following impressive performances at the No-Gi Worlds and the 2024 ADCC World Championship, Danaher promoted Crevar to brown belt in December 2024, recognizing her rapid technical advancement and competitive success.

On April 18, 2025, Crevar achieved a historic milestone at WNO 27, submitting elite competitor Elisabeth Clay via Rear Naked Choke. This victory secured her the Who’s Number One 145 lbs title, making her the youngest-ever WNO champion at 18 years old. The win solidified Crevar's reputation as one of the most promising young talents in the sport.

Crevar established herself as a dominant force in Polaris Professional events, maintaining an undefeated 3–0 record. In 2024, she captured the Polaris Women's Lightweight (70 kg) title and successfully defended it twice. Her consistent performances earned her an exclusive contract with Polaris in the United Kingdom, marking a significant advancement in her professional grappling career.

In May 2024, Crevar showcased her technical prowess and strategic dominance at UFC Fight Pass Invitational 7, defeating France’s top grappler, Aurélie Le Vern, by decision. This victory underscored her ability to outperform seasoned black belts, further cementing her international reputation as a teenage grappling prodigy.

Crevar is known for her aggressive, submission-oriented style, consistently pursuing finishes against high-level opponents. Her technical versatility enables her to excel in both gi and no-gi competitions, adapting seamlessly across various rule sets. Crevar emphasizes relentless pressure, precise technique, and strategic control, making her a formidable competitor on the international stage.