June is a member of the all-female space pirate crew operating the powerful starship Sol Bianca, with each crew member named after a month of the year. She fulfills the crucial role of the group's computer specialist and hacker, a position that requires her to interact directly with the ship's complex systems. Her technical expertise is tied to a deeper, more mysterious connection with the Sol Bianca itself; she is described as being like a terminal for the ship's computer, and she utilizes a unique interface with the vessel's artificial intelligence through a genie-like digital entity. This bond goes beyond simple proficiency, as June is not entirely human. She was discovered by the crew's leader, April, in a state of suspended animation aboard the abandoned Sol Bianca, and her past includes being the subject of experiments that have enhanced her abilities, leading to a significant degree of introspection.

In terms of personality, June is often portrayed as sharp-tongued, whiny, and a little bitchy, with an air of introversion that sets her apart from her more boisterous crewmates. Her gothic appearance complements her somewhat melancholic and introverted nature, a demeanor largely shaped by the trauma of her past experimentation and her struggle with her own identity. Despite this, she can also display a significant level of confidence, sometimes bordering on egotism, which can lead her to be overly sure of her abilities in dangerous situations. Her motivations are often driven by her past and her unique connection to the Sol Bianca, as uncovering the truth about herself and the ship is a recurring theme. Within the crew, she shares a particularly strong bond with Mayo, the youngest member, taking on a protective, almost sisterly role that helps to soften her more cynical edges.

June's role in the story goes beyond that of a simple hacker; she is central to the series' underlying mystery. A significant plot point involves a computer virus infecting the ship's AI, which causes June to fall gravely ill, directly linking her physical well-being to the health of the Sol Bianca. Her development is highlighted in episodes that force her to rely on her wits and confront her past directly, such as when she and Mayo become trapped inside a high-tech tower modeled after Dante’s Divine Comedy. In this situation, her overconfidence proves to be a liability, and she must learn to overcome obstacles with the help of others, marking a moment of growth for her character. She also takes the initiative to track down their missing crew member Feb and to help Mayo search for her lost family, demonstrating that her sense of loyalty to her found family on the Sol Bianca is a powerful driving force.