En

En is Yūya Sakaki's pet dog in the Yu-Gi-Oh! ARC-V anime.

Appearance
En appears to be a Pembroke Welsh Corgi.

Etymology
En's name along with Core's forms the word "encore".

History
En was found on the street by Yōko Sakaki. When he was found, he was small enough to fit in the palm of Yūya's hand.

Yu-Gi-Oh! ARC-V
After waking up from a dream, Yūya exited his bedroom to be greeted by En and Core. Yūya picked En up and reminisced about when En was a puppy, also noting that he had gotten larger and much heavier since he was a puppy.