Lyeon is a balloon lion from the balloon dinosaur kingdom introduced in the film. His balloon is blue. He initially appears as a bossy and loud character, often shouting at Tinny and the others, but his brash exterior masks a deep anxiety. In reality, he is simply lost and unsure, and his aggressive behavior is a reaction to his own insecurity and confusion. His primary motivation throughout the story is to find his way or to regain a sense of security, which drives him to interact with the main group even though he feigns confidence. Lyeon serves as a supporting figure who at first seems antagonistic but gradually reveals a more vulnerable side as the journey progresses. His key relationships are with Tinny and the other balloon animals, as they help him overcome his fear and isolation. Through the adventure, Lyeon develops a greater sense of trust and learns that he does not need to act tough to be accepted. As a balloon lion, his notable ability is to float using his balloon, which allows him to traverse the sky-bound world alongside the other characters.