The Loneroad-Decoherence Myth companion set is where the X-02 designation ceases to be subtext. Flavour text: 'He is destined to recognise you, his soul eternally seeking to resonate with yours.' 'The once unfeeling weapon came to understand what it means to have a friend, and what it means to love.' Caleb is X-02; MC's counterpart in the arc — as signalled by the v3.0 launch trailer's 'A-01' reference — is designated A-01. In the dark void of the Myth, he shares not only energy but fate with her. Their paired weapons carry the names Destructio (destruction) at the start; by the arc's resolution they have been renamed to Awakened Vitality (Caleb's) and Construo (MC's). Two weapons designed to destroy each other choose instead to sustain each other. The wiki does not fully disambiguate whether X-02 is a literal main-timeline designation or a Myth-frame metaphor for the same dynamic established in the v3.0 trailer copy.