David emerges in the television series’ final acts as a Blue Fixer reserve pilot, temporarily assuming protagonist Marin’s role to operate the Baldios mecha’s PulsarBurn module. When enemy forces escalate hostilities, he spearheads a high-risk infiltration mission, detonating an Aldebaran installation through a self-destructive maneuver. His abrupt arc—from introduction to sacrificial death within one episode—mirrors the conflict’s intensifying brutality.

The film adaptation integrates him earlier, depicting a prelude battle where his attempt to activate the PulsarBurn exposes critical flaws. A synchronization failure with Baldios paralyzes the mecha mid-combination, directly causing the team’s tactical defeat. His revised demise occurs during a last-ditch assault on the Aldebaran fleet, destruction engulfing his unit as Earth’s forces strain against collapse.

Both iterations omit personal history or internal drives, positioning David exclusively as a narrative catalyst for pivotal combat losses and thematic reinforcement of wartime attrition.