Katze, a calico or tortoiseshell cat, visits cellist Gauche during nightly practice sessions. The cat initiates contact by delivering a tomato from Gauche’s garden and demanding he perform Schumann’s "Träumerei." Gauche reacts irritably to the cat’s cheeky and demanding demeanor, choosing instead to play the aggressive "Tiger Hunt in India." His vigorous performance startles the cat into leaping before it flees in fright.

This confrontational encounter marks Gauche’s first interaction with visiting animals. Though contentious, it inadvertently sparks his journey toward deeper musical expression. The cat’s involuntary physical reactions during "Tiger Hunt in India" hint at art’s transformative power through emotional engagement—a central theme in Gauche’s growth.

The cat never reappears, and unlike with the cuckoo, Gauche extends no apology or reconciliation. This unresolved departure may align with cultural or narrative interpretations of cats as independent or unforgiving creatures. Despite its fleeting role, Katze establishes the framework for Gauche’s evolving relationship with music, challenging his technical rigidity to awaken emotional resonance.