|Series||Codename: Kids Next Door|
|Nano Item||Rainbow Monkey Doll|
|Voiced by||Lauren Tom|
Numbuh Three (real name Kuki Sanban) is one of the main five children from Codename: Kids Next Door and is the most childish in terms of personality. Her home nation is Japan (making her and Samurai Jack the only Japanese characters in FusionFall). She has two uptight parents and a younger sister in her family. Her biggest weakness is her love for every type of animal and her favorites are the Rainbow Monkeys, stuffed toy monkeys. As an adult, she later married Numbuh Four and became the president of the Rainbow Monkey Corporation.
FusionFallIn FusionFall, Numbuh Three is lost in The Future when Fuse's forces nearly conquer Earth. In the Past, she's at Mount Blackhead with Numbuh Four, Coco, Mac, and Ed. She wonders about Mandy's cold personality and thinks she needs a hug. Her sweet personality has easily made her friends with Bubbles. She also helps the player during the Bubbles Nano mission by promising to care for Bullet, Bubbles' squirrel friend, as the player hunts down and defeats Fusion Bubbles at the nearby Infected Zone. When the player heads for Monkey Mountain to complete the Numbuh Three Nano mission, she asks for the player's aid in saving a family of monkeys and eventually saves them all including Baby Monkey who was in possession of Fusion Numbuh Three.
- She and Numbuh Five are the only ones from the KND whose Nano types aren't the same colors as their sweaters.
- In Numbuh Three's Nano mission, Numbuh Three tells the player to "Defeat Fusion Juniper Lee," when actually the player will be fighting Fusion Numbuh Three.