Samantha Sitbon is Harman Smith's maid. She is a college student who takes care of Harman for three days out of the week, mainly for scholarship aides.
In several cutscenes during Garcian's Trailerhouse it is shown that she both molests and teases Harman (during a cutscene in Sunset she was forcing him to eat and in Alter Ego she kicks him in the stomach), but whenever Harman awakes she becomes a fully obedient servant. She is also sexually aggressive (as shown in Cloudman when she was having sex with Harman she tells Garcian she didn't notice him).
She is also mentioned in the Carrier Pigeon letters, and in the end she receives the name Samantha Smith. Hand in killer7 states that she previously held the name as well, as a killer in the Smith Syndicate, with Sitbon being the name she takes as a maid. This implies that by the end of the game, Samantha possibly becomes a killer once again.
When she was young, she was friends with Jaco Checkbox's daughter.