She is the nekomata shikigami of Yakumo Ran (who is herself the shikigami of Yakumo Yukari). Despite her knowledge of black magic, Chen is rather weak by herself, only gaining a massive increase in power in the presence of her master. She is also weakened by water. Like Ran, Chen is actually the shikigami spirit possessing the nekomata, although she appears to have only a partial hold on her host and doesn't suppress the host's personality, resulting in Chen as a character being a symbiosis between the two.
Fanworks frequently portray her as a daughter figure to Ran, often exuding a level of cuteness that often gives her epic nosebleeds. She is also considered an honorary member of Team 9 in some fanwork circles. She appears to have befriended Kaenbyou Rin in Foul Detective Satori, who has passed on her habit of finding and retrieving dead bodies.
Person: nekomata, short hair, medium hair, brown hair, brown eyes, cat ears, animal ear fluff, cat tail, two tails
Outfit: green headwear, mob cap, red vest, white shirt, long sleeves, yellow bowtie, red skirt, skirt set, brown footwear, red footwear, shoes
Accessories: animal ear piercing