Nijuu Mensou no Musume
The Daughter of Twenty Faces
Chiko
Heiress of the Phantom Thief
The Daughter of 20 Faces
二十面相の娘
Chiko is the daughter of the wealthy Mikamo family who has to live with her aunt and uncle after her parents passed away. Because her aunt wants to inherit the Mikamo family's wealth, she gives Chiko poisoned food. One day, however, she's kidnapped by the Nijuu Mensou (20 Faces) and decides to join his clan.
(Source: ZOMG)