Takumi Takeda

Takumi Takeda is the Code-0 Red Ranger, who later becomes the Code-666 Red Daemon Ranger and eventually becomes Ultimus as a result of the infinite time loop caused by Brady Seitz.

Power Rangers Omni Cross-All Stars
Takumi Takeda was to die in the final battle against Ultimus by using his sacrificial attack. However, Brady Seitz stopped time right before Takumi was about to die and time warped him to the end of Power Rangers Demonseekers. Brady explained that Takumi could save his own life by destroying Ultimus before his rise to power. Takumi then attacked the Power Rangers Demonseekers team, seeking to destroy the Demonseekers Red Rangers' Demon, who would ultimately become Ultimus. As a result of the battle, Takumi unwillingly absorbed the Red Rangers' Demon, fusing with it and becoming Ultimus. This caused an infinite time loop between the year 2020 and 2066.