Chai En, known as チャイ・エン in Japanese, is a fictional character from the popular anime series Doraemon. He is a classmate and friend of Nobita, the series' protagonist. Chai En is characterized by his robust physique and often acts as the school bully, although he has a soft side, especially when it comes to his love for singing, despite his lack of talent. His interactions with Nobita and other characters provide both comedic and heartfelt moments, making him a memorable presence in the series.