Shinjiro Otani (大谷晋二郎, born July 21, 1972) is a Japanese professional wrestler contracted to Pro Wrestling ZERO1. Otani is also the acting President of the company.

Otani was the first WCW World Cruiserweight Champion, defeating Wild Pegasus in a tournament final to be crowned champion on March 20, 1996. This was the start of his push as a legitimate junior heavyweight contender. Over the years, Otani earned the J-Crown and was also part of the first IWGP Junior Heavyweight Tag Team Champions with Tatsuhito Takaiwa.

In 2000, New Japan booker Riki Chōshū, eager to push his protege Kensuke Sasaki above everyone else, downgraded the junior heavyweight members to mere jobbers for the heavyweights. Otani protested and was sent abroad to bulk up. Returning in 2001 as a full-fledged heavyweight, Otani challenged Sasaki for the IWGP Heavyweight Championship, but failed.

Eduardo Gory "Eddie" Guerrero Llanes (October 9, 1967 – November 13, 2005) was a Mexican-American professional wrestler born into the Guerrero wrestling family. He wrestled in Mexico and Japan for several major professional wrestling promotions. In the United States, Guerrero wrestled in Extreme Championship Wrestling (ECW), World Championship Wrestling (WCW), and in World Wrestling Entertainment (WWE). Guerrero's gimmick was that of "Latino Heat", a crafty, resourceful wrestler who would do anything to win a match. His catchphrase became "I Lie! I Cheat! I Steal!," which was used in one of his entrance themes. Guerrero partly used this phrase in his autobiography Cheating Death, Stealing Life.

Despite being a villain for most of his career, he got over in and outside the ring being the youngest, yet most popular and successful of the Guerrero brothers. Guerrero was widely regarded as one of the most respected and gifted technical wrestlers in history. Throughout his career, Guerrero encountered various substance abuse problems outside of wrestling, including alcoholism and an addiction to painkillers. His real-life problems were sometimes integrated into his storylines. Notwithstanding these issues, Guerrero won 23 titles during his career, including the WWE Grand Slam Championship.

Leon Allen White (born May 14, 1955) better known by his ring names Big Van Vader or Vader, is an American semi-retired professional wrestler. White is perhaps best known for his time with New Japan Pro Wrestling, World Championship Wrestling, World Wrestling Federation and All Japan Pro Wrestling in the 1990s. A super-heavyweight wrestler capable of significant aerial maneuvers as well as power moves, he was both a face and a heel in several professional wrestling promotions. During his career, he became an eight time world champion (three times in World Championship Wrestling, three times in New Japan Pro Wrestling and two times in All Japan Pro Wrestling).

While working out at a gym, White was spotted by a man who remembered him from his college football days who suggested he look into professional wrestling. Trained by Brad Rheingans, White got his first national exposure in the American Wrestling Association. He went by the moniker "Baby Bull", which was later changed to "Bull Power". White honed his skills during this time, and his ring work improved significantly, so much so that he was given a match with Stan Hansen for the AWA World Heavyweight Championship.