Beach is a wolf in Giro's pack, defined by a sturdy build and brown fur. His physical traits include a high body, long legs, a broad skull narrowing to a tapered muzzle, a bushy tail, and dense underfur. Original book illustrations and select adaptations depict him with a leaf-crafted eyepatch, a detail omitted in the television series.

Personality-wise, Beach exhibits unwavering loyalty to pack leader Giro, obeying commands during hunts and pursuits of deserters. He pragmatically upholds wolf predatory instincts, asserting that consuming prey like goats is essential for survival and viewing cross-species friendships as endangering the pack. He shows protective devotion to his less intelligent twin brother Zack, maintaining their partnership in pack activities despite Zack's dimwittedness and never mistreating him.

Throughout narratives, Beach operates as Giro's enforcer. He joins the Crumbling Hills ambush targeting goats, tracks defectors Gabu and Mei, and participates in the avalanche-inducing mountain confrontation. While deferring to higher-ranking wolves like Barry during hunts, he displays initiative—such as impulsively chasing goats before Gabu redirects him. His actions reflect pack mentality, including comedic distractions like fixating on flowers during searches.

Beach's relationships show minimal evolution. He remains a rigid enforcer of pack norms, confronting Gabu over his bond with Mei and joining the final hunt against them. He survives the avalanche, though his later activities go unrecorded. His role persists unchanged as Giro's subordinate, with no substantive character development or expanded backstory.