Crunch serves as one of two main protagonists in the "Nico Nico Trush Box" duo, operating alongside partner Shout as specialized "midnight dumpsters" or "garbage abandoners." They dispose of challenging items, including heavily worn sneakers, barely-used health appliances, collections of ex-partners, and compromising digital communications like mistress chat histories. A silent and gentle hacker, Crunch exclusively programs and maintains their disposal systems, known as the "crazy train." His reserved technical role contrasts with Shout’s samurai-inspired demeanor and mechanical skills. When the witch Makina enlists their services to discard her magic-critical grimoire, Crunch aids in overcoming its resistance to conventional disposal methods. This collaboration with Shout and Makina drives their core narrative. Crunch’s background, physical traits, and personal history remain undocumented, with his involvement centered on operational duties and technical expertise within the team.