Sister (シスタちゃん) is a nun hamster who appears in the Hamuchanzu de Gozaimachu! manga series.
On the English Ultra Rare trading card, an otherwise unknown hamster appears; who is, going by Gozaimachu hamster order, put in Sister's place. Upon close inspection, it appears that this actually is Sister, heavily modified to remove any religious context.
- She is often shown surrounded by the Djungarian Choir in artwork, which may imply they belong to the same church.