Cosmo is a character from the anime series Shin Chan, specifically appearing as the European and Dutch localized name for the character originally known as Tooru Kazama. This name was used in dubs produced by Vitello and Phuuz, distinguishing him from the heavily modified counterpart Georgie in the Funimation English dub. Cosmo is a young boy and a classmate of the main character in kindergarten.

In terms of personality, Cosmo is presented as the intellectual of his peer group, often considered the class genius. He possesses a well-groomed and well-mannered demeanor, and he likes to think of himself as highly sophisticated and mature. Despite this self-image, his age shows through in his behavior; he is actually a somewhat spoiled child who can be prone to vanity about his own abilities. For example, while he might claim to be above certain childish interests, he still displays an extensive knowledge of them, revealing he is not quite as grown-up as he pretends to be. His primary motivation often revolves around maintaining his status as the most capable and intelligent child in the class, which leads to frequent conflicts with his friend Shin, who delights in making annoying comments and disrupting Cosmo's sense of order. Cosmo typically cannot stand Shin's antics, and their rivalry is a common source of humor, with Shin often getting the upper hand in their arguments.

Within the story, Cosmo serves as a foil to the chaotic and crude behavior of the protagonist. While other friends like Max, who is highly sensitive and prone to crying, and Bo, who is very quiet, fill specific roles in the group, Cosmo often tries to act as the mature voice of reason. He shares a key relationship with a girl named Nini, who, despite not being very humorous herself, often scolds Cosmo or tells him to behave normally when he gets into disputes with Shin. A significant development occurs in one episode where Cosmo announces he is leaving the kindergarten to attend a special school for gifted children. The class holds a sentimental farewell party for him, and despite his usually aloof and intellectual nature, he is deeply moved by a song Shin sings in his honor. However, after only a few days away, he returns because he misses his friends. This arc demonstrates that despite his pretensions of superiority, his emotional attachment to his companions is genuine. His notable abilities include his high intelligence and academic skill, which set him apart from his peers and form the basis of his identity within the group.