TV-Series
Description
Pontarō Kumoi is an ordinary schoolboy who becomes the first human acquaintance and closest companion of the thunder child Pikkari B. He is the eldest son of the Kumoi household, the family with whom Pikkari B. comes to live after arriving on Earth from the land of thunder. When Pontarō first meets the strange boy who has descended from the sky, he mistakes him for a monster and tries to get rid of him, but Pikkari B. follows him home anyway. Pontarō warns his grandmother about the visitor, yet she grows fond of the boy after he helps protect her from a robbery, and Pikkari B. is taken into the family from that point onward.

In personality, Pontarō is kind-hearted and somewhat timid, and he is presented as a fairly average student who struggles with his studies. His mother is strict with him over his poor school results, and his gentle, unassertive nature means he is rarely the one driving events forward; instead he is a dependable presence who goes along with the plans and mischief of those around him.

Pontarō is a member of the neighborhood children's group called the Wanpaku Six, alongside the group's leader Gonta, the strong-willed girl Gamiko, the overweight and ever-hungry Genshoku, the clothes-conscious Karudan, and the abacus-carrying Reji. Together with Pikkari B., the group explores unfamiliar places, becomes involved in curious incidents, and regularly crosses paths with recurring troublemakers such as the self-proclaimed ninja 00 Goemon and the stray cat boss Gaponeko. Pontarō's family is also a regular part of his world: his father Kantarō works at a toy company, his mother Ayame keeps a watchful eye on his studies, his younger sister Chīko is the more dependable of the two siblings, and the family dog Hagishiri shares Pontarō's nervous temperament.

His key relationship is with Pikkari B. From an uneasy first encounter, the two develop a close friendship, and Pontarō's home effectively becomes the thunder boy's base on Earth. Pontarō supports his guest as the newcomer gradually learns human speech and the rules of human society, and the two share most of the adventures and commotion that unfold around them. Unlike Pikkari B., who can create thunderclouds, fly through the air, bring heavy rain, and use a special beam to make flowers bloom from people's navels, Pontarō possesses no supernatural abilities; his role in their adventures rests on his ordinary, dependable company.

Pontarō's development is most visible in his changing attitude toward Pikkari B.: he begins by treating the visitor as a frightening creature to be avoided and ends by accepting him fully as a friend and a member of the household. Beyond that, he does not undergo a dramatic personal transformation; his significance lies more in his steady function as the grounded human companion whose home and loyalty give the thunder boy a place to belong.