Fumu, called Tiff in English adaptations, holds the role of deuteragonist in the anime. As the eldest child of Sir Ebrum and Lady Like—advisors to King Dedede—she resides in the castle alongside her mischievous younger brother, Tuff. Though their personalities clash, the siblings unite to thwart Dedede’s schemes and aid Kirby. Initially disappointed by Kirby’s infant-like demeanor, Fumu adapts swiftly, becoming his steadfast guardian and leveraging her sharp intellect to guide him.

Her academic interests in marine biology, archaeology, and environmental science frequently aid in resolving crises, while her genuine empathy enables her to summon Kirby’s Warp Star—a skill Meta Knight attributes to her unique compassion. Fumu’s idealism drives her to oppose environmental harm and Dedede’s corruption, yet her impulsive temper and occasional naivete lead to hasty accusations or conflicts. Antagonists exploit her stubborn pride, manipulating her into rash decisions.

Relationships shape her journey: she balances sibling rivalry with loyalty toward Tuff, receives cryptic mentorship from Meta Knight, and navigates a protective yet occasionally overbearing dynamic with Kirby. Kine, a sunfish, expresses unrequited affection, often checking on her welfare. Over time, Fumu evolves from reactive ally to proactive leader, investigating threats, mediating disputes, and strategizing alongside Kirby. Meta Knight’s training hones her combat skills, while her advocacy challenges Dream Land’s complacency, particularly in ethical or environmental crises.

Design-wise, Fumu draws from a yellow-skinned princess in a pilot episode, retaining visual and narrative elements while reimagining her as a non-royal castle resident. Beyond the anime, her sole post-series appearance is a plush cameo in Kirby’s 30th-anniversary artwork, with no further roles in official media.