Xiaohei is a mystical being known as a spirit cat, characterized by his black fur and blue eyes. He is the protagonist of the series 'Luo Xiao Hei Zhan Ji,' which follows his adventures in a vibrant world where humans and spirits coexist. Xiaohei embarks on a journey to find a new home after his forest is destroyed, encountering various other spirits and humans. Throughout the series, he learns about friendship, identity, and the delicate balance between the human world and the spirit realm.