McDull is a male pig who can be distinguished by a birthmark（胎痣） on his right eye. He has a heart of gold, but he isn't very smart and ordinary in every way; nevertheless, he has many dreams. However, every time he tries, he fails; he is disappointed, but tries again, exploring other dreams. In this way he creates his own colourful world. He lives his life simply and naturally. He is not perfect, but his attitude towards life, namely of never giving up, makes him a popular character。
The name McDull actually has a story itself. When Mrs Mak was going to give birth to McDull, she saw a magical plastic basin (pronounced roughly as "dull" in Cantonese) flying over her head. Believing it a sign from the gods, she named her son as "Dull"。