Osse

Osse, also known as Little Wuus, is an adorable white cat that appears in Genshin Impact, first introduced in the 4.6 version's "Underwater Nocturne" quest. Players must follow it into the mysterious Faded Castle and interact with it during the quest. After completing the quest, Osse stays in Petrichor Town, where players can unlock the hidden achievement "Owner's Duty" by feeding it. This cat is not only a key character in the quest but has also become a beloved companion for players in the game.