DELTA

DELTA is a robot researcher in Pikmin Forever who crash-lands on PNF-404, and who meets with Captain Olimar, becoming the second playable leader in the story. She is the latest test of the Koppai-Hocotate Alliance explorer-technology relations program: a robotic space explorer that can function alongside other explorers with adaptive reasoning and feeling. She begins her research mission to PNF-404 with Edward as a standard helper robot with simple synapses and understanding; their KHA Lander crash-lands and she falls into the Scalding Thicket. However, as she finds Olimar and ventures on in the story, her synapses develop into a complex, compassionate mind that can understand even the complexity of the Pikmin and Onions. As DELTA progresses, she figures out much about herself and the mission's design: for example, she notes that she has a spacesuit (which she ordinarily would not need) to make her appear more approachable than a regular robot skeleton. She also figures out that the KHA eventually intends to replace its space program staff with robots. In the Forbidding Precipice she is temporarily kidnapped by the Helmeted Iceweavil, leaving Olimar and Louie to their teamwork to rescue her. Once she is freed she describes having a "near-death experience" and becomes self-aware. She helps make sense of Edward's findings once he is found.

In the game, DELTA is unlocked as a leader by defeating the Emperor Bulblax in the Emperor's Crown. She can run a bit faster than other leaders; other leaders keep up with her when following her, making her best for trekking long distances. Her whistle also expands faster than other leaders' whistles, although hers lasts a bit less time. These differences do not exist in Challenge Mode, but they can be allowed in the Sandbox.