*Blueberry Muffin is now a rather silly individual who loves all things spiritual and unique in their own rights. Despite her soft voice is very energetic and spontaneous. She is a daydreamer, foolish, and often spaced out, but she is surprisingly intelligent and can figure out clever solutions to most situations in her own special way. Blueberry is extremely creative and has a very "go with the flow" type of worldview, a combination which can often lead to her doing weird things such as putting vegetables or spices in ice cream, painting by using her face, or believing she can hear plants and objects talk. She considers the universe itself as a friend, and believes everything that happens is the universe guiding her. While she can be seen as weird or foolish, her psychic outlook on the world often proves to not be entirely unfounded, as she seems to have an extraordinary amount of luck, whether by chance or fate.

Despite her serene and bubbly attitude, Blueberry does have some less-than-peaceful parts of her buried beneath the surface. Despite her ideals of a calm and composed body and mind, she can be seen becoming irritated and furious when around her brother, Everything Bagel, who is the only berry that can genuinely make her angry. In "Following the Recipe", Blueberry admitted that she was ashamed and embarrassed of her dyslexia, which is why she never told anyberry about it, and preferred to go with her instincts rather than try to read recipes. However, when Strawberry comforted her and helped her see she shouldn't be ashamed of it, Blueberry appears to have gotten over this insecurity, though she still prefers going with the flow.

Blueberry is an East Asian girl with dark blue hair tied into a very big bun, flat bangs, and twin hair strands on each side of her face. She has light skin, a small nose, and blue-grey eyes. She wears a long-sleeved sweater-like blue dress with a blueberry-shaped button on the front, a dark blue choker, light purple leggings, and brown boots. Her hair tie is light blue with a light pink flower attached.

In summer episodes, Blueberry wears a plain, sleeveless blue summer dress with a blueberry emblem in the center, purple shorts, a thin light blue vest, and brown sandals.

In winter episodes, Blueberry wears a fluffy, blueberry-polka-dotted winter dress, blue winter coat with fur cuffs, blue earmuffs, purple leggings, and brown winter boots.

In sleepover episodes, Blueberry wears a white tank top undernearth her blue pajamas with a light gray cloud pouring dark blue dots on the middle, purple pants, and light blue slippers with two blueberries.*