One-One is a small spherical robot, and the conductor of the Infinity Train. His "Glad half" has a bubbly, childlike voice that’s always chipper and overjoyed no matter the situation.

By contrast, Merged One is cold, detached, and clinical — apathetic in tone. Seeking a performance that can swing between over-the-top cheer and chilling detachment, while keeping the eccentric, unsettling charm of Jeremy Crutchley’s original voice.