Dada-chan is a main character in his series, forming the central trio with Little Pigg and Little Kane. He resides on a distant planet inhabited solely by children, embarking on adventures and collaborative activities with other little kaiju. His personality combines a passion for invention with a direct and often blunt communication style. Despite this outward straightforwardness, a core kindness consistently emerges through his actions. He possesses strong enthusiasm for building and creating, driven by dreams like constructing a rocket ship.

His relationships underscore his role as a reliable yet temperamental inventor within the group. He collaborates with Little Pigg and Little Kane on various projects, demonstrating teamwork and shared problem-solving. Dada-chan once led his friends into a forest to pursue an ambitious vision, resulting in the construction of a giant robot, showcasing his inventive drive and ability to inspire collective effort.

Dada-chan and his series appear in a cameo within the 2024 animated film *Ultraman: Rising*, depicted as a popular children's program in that film's universe.

His design and concept originate from the original Alien Dada, a three-faced extraterrestrial antagonist from the 1966 Ultraman series known for technological prowess and human experimentation. This connection provides foundational lore, though Dada-chan's childlike reimagining transforms those traits into playful inventiveness and curiosity. The original character's association with Dadaism—an art movement emphasizing absurdity and avant-garde expression—informs Dada-chan's thematic emphasis on creativity and unconventional thinking.