Udo is a 30-year old member of the Maritime Self-Defense Forces and a fiance of 28-year old inspector general of Secret Military Agency BCST, Sara Mizuhara (see TLT). When a mysterious ball of blue light detected in the Pacific Ocean, he and his crew sent to investigate it. However, the object attacked the whole crew and killed every one on board save Udo whom it took as a host, changing him physically and genetically as it withered away at his humanity.
Taken back to a lab for interrogation, he absorbed lizards to transform into a lizard like humanoid creature which escaped by slaughtering its way through anyone who dared to get in it way. Before leaving he was shot by a poison bullet by Udo's former fiance Sara, injured it escaped thanks an emotional moment of weakness. The One then went on to slaughter an entire navy boat before being seen again with Udo's last words is for begging Sara to kill him before his will is fully taken over by the beast.
While his body has been possessed by the one, he has these following abilities, as it appears as a normal person but mutated with scaly and spiky skin with fangs for teeth and claws, it is still dangerous.
The powers of this form are present in all of the One's later forms.
- Transformation: The one can transform into his true form back into his first form when ever he likes. In human form he can also partially transform his limbs. The One's transformation was similar to that of the Next but glowed blue where as his enemy shined red.
- Merging: Like the Next, the one merged with a human host, however the One took over the human effectively killing his humanity
- Travel Sphere: Like the Next, the One traveled through space via a sphere of light, only his was blue
- Adaption: The One was able to gain immunity to a poison designed to kill it, it was even immune to a modified version of the venom
- Absorption: The One can absorb any living thing in order to gain power or change form