Kaisei Takechi is a performer of the 16-member group THE RAMPAGE from EXILE TRIBE. He was selected as a candidate member of the group in "EXILE PERFORMER BATTLE AUDITION" held in 2014. In September of the same year, he became an official member of the group on the final show of Musha Shugyo at SHINKIBA STUDIO COAST. On January 25, 2017, the group made its major debut with its 1st single "Lightning". He is good at KRUMP/Jazz.

In 2019, he claimed the overall win in the Stylish Guy category of the 【SUMMER STYLE AWARD 2019 ROOKIE CHALLENGE CUP】.
After playing the role of a professional wrestler in the online drama "Fukumen D" in 2022, he made his debut as a professional wrestler at "Into The Fight 2024", hosted by DDT Pro-Wrestling, in Korakuen Hall on February 25, 2024 and achieved his first vitory.
He won the Newcomer Award at WEEKLY PRO-WRESTLING "PRO-WRESTLING GRAND PRIX 2024", which was published on January 29, 2025.

In addition, on TBS "SPORTS DANSHI GRAND PRIX 2024 Aki", he became the first one to win three consecutive championships in the history of the program.