|Name in Japanese||猿飛 悟|
|Rōmaji Translation||Sarutobi Satori|
|Appears in||Manga, OVA|
|Voice Actor (Japanese)||Tomoko Kaneda|
Satori Sarutobi (猿飛 悟 Sarutobi Satori ) is Saru's/Chimp's little sister who appears in the original manga and the OVA series. After being saved from a burning movie theatre by Nagasumi, she calls him "Nagasumi Willis" after "Bunta Willis" an action hero that parodies Bruce Willis and Bunta Sugawara. She develops feelings for Nagasumi.