Billy Cranston was born 0n April 1, 1979 in Chicago, Illinois. He was one of the five "teenagers with attitude" selected by Zordon to become the original Power Rangers. Billy became the Blue Mighty Morphin Power Ranger due to his intelligence and patience. He was given both the Triceratops Power Coin and the Triceratops Dinozord.

Initially shy and insecure, Billy was a highly intelligent individual that was always eager to learn, this resulted in Billy often speaking in what could only be described as technical jargon during his teenage years, talking with a more scientific terminology even in the most casual conversations, with only his friend Trini being able to understand him most of the time. During his time as a Blue Ranger, Billy slowly grew more confident and sought out to improve himself physically. He created many gadgets with which to solve problems that not even Zordon foresaw, and even invented the first team's wrist-worn communication devices.

Billy assumed the role of leader of the team after the rest of his friends were de-aged by a time-reversal spell, this lead to him interacting with the Alien Rangers and discovering that he could still be very useful even if he wasn't a Ranger. This revelation led Billy to step out of his role as a Ranger officially after his team was given the Zeo Powers, letting Tanya take his spot and becoming a full-time technical advisor. After he needed to heal from accelerated aging on Aquitar, Billy fell in love with Cestria and decided to stay on the alien planet with her, officially leaving the team.

In 2022, Billy tried to bring back Zordon but unintentionally brought back Rita Repulsa who gained a robotic body after taking over Alpha 8’s body. Billy followed Rita and ended up fighting her and a gang of Putty Patrollers, eventually he sent a distress call which was answered by his former Team but the fight ended in tragedy when Trini Kwan was killed by Rita.

One year later, on the anniversary of Trini’s death, Rita returned and captured Jason Lee Scott, Kimberly Hart, and Tommy Oliver. Billy was able to escape capture along with Zack Taylor and Trini’s daughter, Minh. Back at the new Command Center, Alpha 9 activated Bandora Protocol, and with the help of Zack, Minh (who had become the new Yellow Ranger), Rocky DeSantos and Kat Hillard, Billy was able to fix his past mistake and avenge his fallen friend.

Months later, Billy joined the Dino Fury Rangers to fight the new threat of his old enemy, Lord Zedd, and his alliance with Squid Ink Inc., who sought to eradicate good from the universe. Billy assists Solon in mentorship responsibilities for the Rangers, who became the Cosmic Fury Rangers, and along with several Rangers, Billy helped the team eliminate the enemy fleet. After their victory, Billy learned from Aiyon that he had encountered Zordon, which affirmed his resolve to find his old mentor.