About this deal
This could be a reference to the Pokémon anime series where the character Nurse Joy keeps reappearing in all the towns the protagonist visits with the explanation being that they are all "identical cousins".
Ashcraft, Brian (September 4, 2013). "Animal Crossing Sure Looks... Different in Manga Form". Kotaku. Archived from the original on March 22, 2019 . Retrieved March 22, 2019. Abou-Nasr, Adam (September 14, 2015). "Animal Crossing Characters Available in LINE Messaging App". Nintendo World Report. Archived from the original on June 6, 2019 . Retrieved June 6, 2019. She has appeared in a manga called Tobidase Dōbutsu no Mori Minna de Seseragi Mura Life as one of the main characters.Her name could also reference to her birthday being in December. Jingle bells are typically associated with Christmas, and she wears a red ribbon with bells in her fur that jingle when she walks or tilts her head. In addition, the bells in her fur jingle whenever she moves. If the player speaks to her during a Fireworks Show in New Leaf, Isabelle will say that the clothes she is wearing there were a present from Digby. http://www.nintendolife.com/news/2015/10/random_isabelle_still_seems_upset_at_negligent_animal_crossing_new_leaf_mayors Sarkar, Samit (April 1, 2015). "Mario Kart 8's Animal Crossing DLC arrives early on April 23". Polygon. Archived from the original on March 22, 2019 . Retrieved March 22, 2019.
The hiragana spelling ( しずえ shizue ?) may be a simplified reading of more complex kanji that are meaningful to her character. While he is at The Roost in New Leaf, Digby may mention Isabelle's coffee preference, and compare it to his own. Brown, Ashley. "Animal Crossing: New Leaf and theDiversity of Horror in Video Games" (PDF). University of Skövde. Archived (PDF) from the original on June 6, 2019 . Retrieved June 6, 2019.
Oxford, Nadia (August 8, 2013). "Why Does Everyone Keep Playing Animal Crossing?". US Gamer. Archived from the original on June 6, 2019 . Retrieved June 6, 2019.