Mia Williams (played by Katie Jarvis) is a protagonist in Fish Tank.
Mia is a volatile and isolated fifteen-year-old living with Joanne and Tyler on an East London council estate. She struggles with aggression, loneliness, and her desire for escape through dance. Her encounters with Connor, Billy, and Keira drive the central emotional and moral conflicts of the story. Tyler Williams (played by Rebecca Griffiths) appears in Fish Tank.
Tyler is Mia's younger sister and Joanne's other daughter. She is described as precocious and does not always get along with Mia, yet their bond remains visible beneath the hostility. Tyler joins the family dancing at home and embraces Mia before she leaves for Wales with Billy. Keira (played by Sydney Mary Nash) appears in Fish Tank.
Keira is the young daughter seen in footage at Connor's middle-class home. After discovering Connor's family, Mia leads Keira away and pushes her into the River Thames during a confrontation. Mia then helps her out and returns her anonymously, prompting Connor to chase and slap Mia. Billy (played by Harry Treadaway) appears in Fish Tank.
Billy is the younger of the two men who own the tethered horse Mia discovers at a Traveller encampment. Unlike the other man, he is less hostile toward her. He later accepts Mia's help stealing a car part, tells her the horse has died, and invites her to move with him to Cardiff. Tyler's Friend (played by Toyin Ogidi) appears in Fish Tank.
Tyler's Friend (played by Carrie-Ann Savill) appears in Fish Tank.
Billy's Brother (played by Jason Maza) appears in Fish Tank.
Billy's Brother is associated with the Traveller encampment where Mia finds the tethered horse. Together with Billy, he catches Mia attempting to release it and pursues her. The role has limited screen presence but contributes to the threatening circumstances of Mia's initial contact with Billy. Billy's Brother (played by Jack Gordon) appears in Fish Tank.
Fish Tank (2009) character relationship network mapped with AI analysis. Explore the connections, alliances, and conflicts between characters.
Characters
Mia Williams
(played by Katie Jarvis) — protagonist
Mia is a volatile and isolated fifteen-year-old living with Joanne and Tyler on an East London council estate. She struggles with aggression, loneliness, and her desire for escape through dance. Her e...
Tyler Williams
(played by Rebecca Griffiths) — supporting
Tyler is Mia's younger sister and Joanne's other daughter. She is described as precocious and does not always get along with Mia, yet their bond remains visible beneath the hostility. Tyler joins the...
Keira
(played by Sydney Mary Nash) — supporting
Keira is the young daughter seen in footage at Connor's middle-class home. After discovering Connor's family, Mia leads Keira away and pushes her into the River Thames during a confrontation. Mia then...
Billy
(played by Harry Treadaway) — supporting
Billy is the younger of the two men who own the tethered horse Mia discovers at a Traveller encampment. Unlike the other man, he is less hostile toward her. He later accepts Mia's help stealing a car...
Tyler's Friend
(played by Toyin Ogidi) — minor
Tyler's Friend
(played by Carrie-Ann Savill) — minor
Billy's Brother
(played by Jason Maza) — supporting
Billy's Brother is associated with the Traveller encampment where Mia finds the tethered horse. Together with Billy, he catches Mia attempting to release it and pursues her. The role has limited scree...
Billy's Brother
(played by Jack Gordon) — supporting
Canonical Relationships
Family, romantic, and professional connections based on plot evidence.
Billy's Brother → Billy
(brother)
Billy's Brother → Billy
(brother)
Mia Williams → Billy
(Potential Romantic Interest)
Mia helps Billy steal a car engine part from a junkyard, and the scene describes her as appearing to flirt with him.
Story Dynamics
Alliances, conflicts, and narrative interactions that evolve throughout the story.
Mia Williams → Keira
(Conflict Antagonistic Encounter)
Mia leads Keira away from her family, pursues her when she runs, and pushes her into the River Thames during the struggle.
Tyler's Friend → Tyler Williams
(friend)
Tyler's Friend → Tyler Williams
(friend)
Story Analysis
Mia searches for escape and belonging while unstable adults, exploitation, violence, and loss force her toward an uncertain new beginning.
