With the threat of the Red Menace growing in the United States, many members of Kim's family were brought to internment camps. To avoid this fate, Kim's parents decided to move to uncle Marshall's house, which was located in Natick Banks. Kim's personal logs of the experience and this time in life can be found in the upper floor of the house on a terminal.
Within the Pearwood location, a child's bedroom on the third floor has three wooden blocks on a bookcase, arranged to spell out "KIM." A baseball has a notable presence in the room, corresponding to declarations in the personal logs.
Kim's relation to the Wu's mentioned in the terminal entries of the South Boston military checkpoint is not known.
Kim Wu is mentioned only in Fallout 4.