Dave functions as a mechanic and assistant pilot for the White Nuts task force, maintaining and operating their equipment such as the Vertical Take Off and Landing vehicle Big Porter. After combat destroys one Zillion weapon, he reconstructs the firearm using its salvaged core, redesigning it for improved ergonomics before upgrading all three Zillion weapons to match each user's combat preferences. This technical proficiency secures his official position within the White Nuts team.

When the Nohza wars conclude, Dave shifts to a music career with fellow members JJ, Champ, and Apple, forming the rock band "The White Nuts". Amid this peacetime, after the ODAMA Clan kidnaps Apple, Dave joins the mission to infiltrate the clan's fortified mountain retreat for her rescue. The operation encounters critical obstacles due to scarce Zillium—the irreplaceable ammunition powering their Zillion weapons.