When loggers threatened its Amazonian homeland, the Chullachaqui discovered ancient connections between the world's cryptid sanctuaries and followed mystical pathways to the Himalayas, where it sensed the Yeti faced similar threats from human encroachment. Tenzin Norgay recognized the forest spirit's potential and initiated it into the Whiteout Guardians, teaching it to adapt its deceptive forest magic to the mountain's icy terrain while preserving its role as a protector of sacred mysteries.

The Chullachaqui Watcher possesses unparalleled shape-shifting abilities, capable of assuming the form of expedition members, local guides, or even manifestations of the mountain's mythical creatures to lead intruders astray. Its traditional forest magic has evolved in the Himalayan climate, allowing it to manipulate snow and ice to create false footprints, phantom campsites, and illusory Yeti sightings that confound even the most sophisticated tracking equipment. Despite its adaptations, it retains the telltale sign of all Chullachaqui—a reversed foot that leaves backwards tracks in the snow—though only the most observant trackers would notice this subtle flaw in its otherwise perfect deceptions.

The Chullachaqui Watcher serves as both sentinel and deceiver for the Whiteout Guardians, patrolling the boundaries of the Yeti's domain and creating elaborate illusions that protect sacred sites by redirecting curious explorers toward safer, less significant areas of the mountain. It maintains a network of false trails and misleading evidence throughout the Himalayas, ensuring that the true nature and location of the Yeti remains a sacred mystery while collecting intelligence on approaching expeditions for Tenzin Norgay's strategic planning.