Gelo's loyal friend, dO, is a musician who always seeks the best interests not only for himself but also for those close to him. Although some may see him as curt at times, he makes his ambitions and goals clear by constantly pushing forward in his endeavours while disregarding all who stand in his way. When Gelo becomes lax, dO is the motivating force that keeps the momentum flowing within the group. Imbued with passion and determination, dO believes each day is a step towards dreams of success.

We first find dO with Gelo in Episode 1 against the perpetrator known as Fear. They challenged his authority one summer upon the discovery that he was the entity responsible for a recent string of failures. dO initially saw him as a non-factor, brushing him off as a figment of their imagination until they were soon confronted by the nightmarish form in the flesh. Being the first to see the facade Fear extolled, dO knew the farce would soon fall prey to its own demise.