Sumomo (Plum)

Japanese Seiyū
Motoko Kumai
English Voice Actor
Sandy Fox
Sumomo (すもも?) is a mobile persocom – which is the persocom equivalent of a laptop computer. She is programmed to be cute and tends to be quite hyperactive, for example her morning 'wakie wakie exercises'. Shinbo was the original owner of Sumomo, but left her with Hideki after leaving with Takako. He later transfers Sumomo's registration to Hideki, giving him permanent ownership. At the beginning of the series, Shinbo uses Sumomo in an attempt to analyze Chi, and Sumomo is nearly broken in the process, requiring new main memory, and in the manga, a new video card as well. Once Kotoko joined Hideki, she quickly came to the conclusion that Sumomo was mad, with her nonsensical ways.
In the original Japanese version, her seiyuu (Kumai) once worked together with Kotoko's seiyu (Nogami) in Cardcaptor Sakura (another anime adapted from CLAMP's works, as Li Syaoran and Li Meiling respectively). Ironically, in CCS, Syaoran was the more "mature" one of the pair.