Sumomo  

Plum, すもも

Sumomo is a mobile persocom designed to resemble a laptop computer, with cute programming that often results in hyperactivity. In the beginning of the series, Shinbo uses Sumomo to analyze Chi and nearly breaks her due to the need for new main memory and video card. Kotoko later determines that Sumomo is behaving erratically and concludes she's insane. The password for Sumomo, received by Hideki, is "Chobits" (case sensitive) followed by "ちょびっツ" (also case sensitive due to the katakana at the end).