Keiko

Keiko was the babysitter for Reiko's child.

Appearance
Keiko is a middle-aged woman with short brown hair, brown eyes and wears a red sweater. She has a wrinkled face and wears a pair of spectacles. In the manga she is much younger.

Personality
She seems to be a patient and kind woman, as she was seen smiling even as the baby was crying. She was disturbed when she watched Reiko tell her child to shut up.

Plot
Keiko is first seen carrying the crying baby and walking around the house. She annouces to the child when Reiko comes home. Keiko is then unsettled as she watched Reiko tell it to shut up, stating she had it well-trained. She quickly grabs her things and leaves.

It is uncertain how long she works for Reiko, as Reiko is seen carrying her child around in a university and Shirou Kuramori was able to abduct the baby without any sign of her.