 Margaret Qualley portrays Mia Sutton (based on the sociopathic qualities of Light Yagami), Light's girlfriend who assists him in his activities as "Kira".In this adaptation, Light has vast character differences from his manga counterpart, lacks much of the sociopathic, malicious and ruthless qualities of the original character, is more naive, sympathetic and idealistic, does not have a sister and has lost his mother in a hit and run incident, which partially serves as his inspiration to operate as Kira.He has a close yet somewhat strained relationship with his father and while considered academically gifted by peers and authorities, is not a popular student and is considered as a social outsider and lacks friends.