Walnut Cookie is a protagonist in the Cookie Run series, first appearing in Cookie Run: Ovenbreak as an unlockable cookie. She is a kid and young detective who detects mysteries inside places. She is the main protagonist of the Cookie Detective series. She is also Almond Cookie's daughter. She pretend to be good to harm people.
Appearance[]
Walnut Cookie has the same skin color as GingerBrave, and wears a brown hat, brown eyes with white eyes, and a brown outfit with pants with checkers on them.
Biography[]
Cookie Run: Ovenbreak[]
Cookie Detective: Solve The Mystery[]
Walnut Cookie is sent to investigate the fanciest party at Cheesecake Manor, only to find out that GingerBrave went unconscious covered in Strawberry Jam. After beginning the inspection, she gets surprised at GingerBright coming in late. Roguefort reveals themselves and Cheesecake Cookie grows upset over the disappearance of her favorite jewel. The attendeeds manage to chase Roguefort Cookie and discover their tracks. Walnut Cookie yells at Roguefort Cookie about how sad Cheesecake Cookie was when her jewel was stolen, Cheesecake Cookie quietly denying this in the background and pointing out she has a spare. Walnut Cookie demands the jewel. Suddenly, Roguefort Cookie's boat starts to leave as they make their escape. Roguefort Cookie tosses the jewel back to Walnut Cookie, her barely managing to catch it. Roguefort Cookie tells Walnut Cookie that they will eagerly await their next meetup, wishing to apprehend her once again.
Cookie Detective: Find The Produce Pilferer![]
Walnut Cookie receives a letter from Carrot Cookie to try some carrots at the Happy Healthy Hamlet. Although Walnut Cookie doesn’t like vegetables, she interviews everyone. After boarding the train and arriving at the market, Walnut Cookie is given a sack of carrots from Carrot Cookie. Carrot Cookie then takes Walnut Cookie to Spinach Cookie’s shop. Spinach Cookie is impressed at seeing a real detective and tells Walnut Cookie that eating vegetables will help solve cases, to which Walnut Cookie wonders if it’s true. Carrot Cookie asks Spinach Cookie to bring more vegetables, but Walnut Cookie feels that something is wrong. Spinach Cookie screams in shock after realizing all her vegetables have been stolen. Walnut Cookie sets up the barricade tape, and nobody had left through the front gate, proving that culprit is among the Cookies.
After the guilty suspects have been found, Beet Cookie tells Carrot Cookie that a pile of vegetables is covered by Acorn Jellies was found near the fence. Pancake Cookie apologizes to Spinach Cookie and tells her that he doesn’t like vegetables. Spinach Cookie apologizes for pressuring him to eat them, taking the guilty suspects to the city to help plant vegetables. Muscle Cookie is awed by Spinach Cookie’s strength, while Squid Ink Cookie walked away.
Cookie Detective: The Butter Painting Affair[]
Walnut Cookie receives news from the Cookie Herald about Roguefort Cookie's recent arrest brought about by the theft of Butter Pretzel Cookie's masterpiece. Almond Cookie, Walnut Cookie's father, detains Roguefort until the investigation is completed. After interviewing everyone, Walnut Cookie reveals that Birthday Cake and Lemon Cookie were moving the painting to the warehouse near the garden while Carol and Whipped Cream Cookie helped them. Chilli Pepper Cookie snuck into the museum, only to return empty-handed.
Curator Emmental Cheese gets upset upon realizing the painting was torn up. Walnut Cookie eventually finds out what really happened, in which Roguefort entered Butter Pretzel Cookie's prep room to watch her paint before leaving. Butter Pretzel Cookie, out of sheer pursuit for perfection, scrapped the painting, and had it slashed up. She blamed the incident on Roguefort Cookie and had Birthday Cake and Lemon in charge of setting up, before claiming it was Roguefort stole it. Gumball and Mustard Cookie cheer up the disheartened Butter Pretzel Cookie, and afterwards, the detectives thank the audiences for encouraging Butter Pretzel Cookie to strive for the better, and Butter Pretzel replies by painting a self-portrait of herself.
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 Heroes
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 Gingerbrave and Friends: GingerBrave | GingerBright | Strawberry Cookie | Zombie Cookie  Ancient Heroes: Pure Vanilla Cookie | Hollyberry Cookie | Dark Cacao Cookie | Golden Cheese Cookie | White Lily Cookie | ||