Joey Heald is a supporting character in the anime Blue Gender, recognized as the youngest member of the sleeper recovery team. He is approximately sixteen to eighteen years old and has blue hair and blue eyes, standing around 185 centimeters tall. His role on the team is specialized; he serves as the driver of a capture hardman, specifically the gorilla type, which indicates his proficiency with heavy machinery used to secure targets in the field.

In terms of personality, Joey is defined by a consistently positive and optimistic demeanor, which stands out against the grim and desperate backdrop of the war against the Blue. He maintains a lighthearted attitude and operates with a carefree philosophy, believing that as long as one can enjoy the present day, that is what truly matters. This outlook is a product of the harsh environment in which he was raised, serving as a coping mechanism that allows him to function without being overwhelmed by the surrounding horror.

His primary role in the story is tied directly to the protagonist, Yuji Kaido. Due to their closeness in age, Joey is the first member of the recovery team to genuinely befriend Yuji. He becomes an important ally and mentor to the protagonist, taking on the role of an arm pilot coach to help Yuji learn how to operate the fighter mechs and survive in the hostile world. This relationship is crucial as it helps bridge the gap between Yuji, who has just awakened from suspended animation, and the hardened soldiers of the present.

Throughout the series, Joey does not undergo a dramatic transformation but serves as a stabilizing presence. His development is more about reinforcing his established traits of loyalty and courage, often supporting his comrades through his mechanical skills and unwavering cheerfulness. While he is a soldier, his notable abilities lie not in sheer combat prowess but in his technical expertise as a driver of complex capture equipment and his social function as a grounding influence for the less experienced Yuji.