Jack serves as a detective within the galactic police force, tasked with investigating possible links between Kaz's team and the space pirate Lady Hebina to uncover evidence connecting them to her crew.

Physically, he displays a bat-themed appearance with teal-blue skin marked by purple accents stretching from his eyes down his cheeks. His features include a small purple nose, red eyes with tiny irises and faintly yellowish sclera, and pointed canines. Orange, bat-like structures flank his head, possibly functioning as ears. His hands bear sharp purple nails, and his feet terminate in two sharp toes. Jack's attire consists of a dark purple helmet with a yellow front section resembling a Greek war helm, extending to his cheeks. He wears purple upper-body armor accented in orange, complemented by gray shoulder pads attached to wing-like extensions featuring gray spines and lighter purple membranes. Underneath, a complex one-piece suit in purple and black incorporates yellow, orange, and darker purple segments, shifting to gray midway down his forearms and calves. The suit fully covers his feet, and though his right hand has a fingerless glove, an orange thumb remains visible.

Personality-wise, Jack maintains a cool, identity-concealing demeanor but exhibits scatterbrained tendencies. Despite his investigative mission, encounters with Kaz's team distract him intensely, shifting his focus entirely to Scan2Go racing—particularly during his debut in the episode "Tracker Jack," where he becomes "hot to join in on Scan2Go racing" and abandons his original objectives. He also develops a fondness for donuts after receiving them from Diego.

Documented media shows no significant evolution beyond these traits, and his investigation into Hebina's potential ties to Kaz's team remains unresolved.