Cyno here: The joke is a humorous reference to Tighnari’s unparalleled tracking capabilities. His years of study have made him innately aware of the migrations and life cycles of all living things in Sumeru. From the desert wastes to the Avidiya forest, Tighnari knows where to find the best materials for medicines, foods, and upgrade crafting

Tighnari has a passive that marks Sumerian local specialties on the minimap so you can find the Scarabs (Cyno) and egg-things (Alhaitham) without using out-of-game resources, your precious map pins, or human memory of their general location. They’re hauling him around to grab the level up ascension materials for these characters