He is one of the Fighting Stick Figures, alongside Red, Green and Yellow, who first appeared in Animator vs. Animation 4, where they met an orange stick figure known as The Second Coming and taught them how to escape their website out into the rest of the internet.

Shown to be naive and peaceful, he prefers to resolve fights instead of joining them and is usually the last one to resort to violence. He has a variety of skills such as farming, cooking, archery and alchemy in Minecraft, being referred to as the "hippie" of the group because of these traits. One of his most defining traits is his serious addiction to nether warts and will go to extreme lengths to obtain them, even at the risk of his own safety.

Blue is shown to be a pacifist, and is described by Alan as a "hippie," probably due to Blue's love of plants and hatred of violence. That said, he is not afraid to fight whenever he or his friends are in trouble. Oftentimes, he is the one to try and diffuse a situation before it gets out of hand.