Esther Coleman

Esther Coleman is a nine year-old Russian girl who now has a foster family, named the Colemans (Kate Coleman, John Coleman, Max Coleman and Daniel Coleman) and she's the main villain of the horror movie, Orphan.

Kate grows suspicious when Esther expresses far more knowledge of sex than would be expected for a child her age. She is further alarmed when Sister Abigail (C. C. H. Pounder), the head of the orphanage, warns her and John about Esther's tendency to be around when things go wrong. Esther overhears this and later kills Sister Abigail by bludgeoning her with a hammer. She convinces Max to help her with this and they hide all evidence in their treehouse.

Daniel decides to retrieve the hammer used to kill Sister Abigail to prove Esther's guilt. However, he announces his plans to Max and is overheard by Esther, who sets the treehouse on fire when Daniel enters it. Daniel is injured falls trying to escape the fire. Esther tries to kill him with a brick, but Max shoves her out of the way just in time. Daniel is hospitalized due to a neck injury and abdominal bleeding. Esther unsuccessfully tries to kill Daniel at the hospital, but doctors save him. Kate, knowing what happened, furiously slaps Esther and knocks her down and is immediately subdued and sedated.

Esther Is Reavealed
Esther tries to seduce a drunken John, who finally realizes Kate was telling the truth. He threatens to send her back to the orphanage. Esther, angry and hurt at being spurned, ransacks her room and fatally stabs John. Max sees this and hides in her closet. As Kate is coming out of sedation, she receives a call on her cell phone from the Saarne Institute. Dr. Väravra (Karel Roden), reveals that Esther is actually a 33 year-old woman named Leena Klammer. She has hypopituitarism, a disorder that stunted her physical growth, and has spent most of her life posing as a little girl. The doctor tells Kate that Leena is dangerous and especially violent. Kate rushes home, only to find John dead. Leena collects a firearm from their safe and shoots Kate in the arm before she goes to search for Max. While firing at Max in their greenhouse, Kate manages to break through from above Leena and knock her out.

The Ending of Esther Coleman aka Leena Klammer
Leena follows Kate outside to a frozen pond where they struggle as Max watches from a hill above the pond. Max maneuvers herself to grab the firearm that was dropped by Kate during the struggle. She fires at Leena but hits the ice instead, which breaks, causing Kate and Leena to drop into the water below. After a brief struggle under the ice, during which Kate is stabbed in the leg and Leena is elbowed in the face, Kate climbs out, followed by Leena, begging Kate not to let her die, calling her "Mommy" while holding a knife behind her back. Kate furiously responds "I'm not your fucking mommy," and kicks Leena in the face, breaking her neck. Leena falls back into the pond, and Max and Kate are met by the police moments after, faced with an uncertain future.