Tan Long is Guan Yi’s childhood friend, depicted as a lanky boy with long limbs and a face like a monkey. He is cheerful and straightforward, often making crude jokes. He encourages Guan Yi’s decision to enter the Secret Realm by saying he would flatten the Secret Realm if Guan Yi got into trouble. Despite his rough talk, he genuinely cares for Guan Yi, promising to take care of him if he returns disabled. He and Cui Cui accompany Guan Yi to the subway station before his departure. His loyalty and humor make him a supportive friend.
