Raijin is a deity of thunder who appears in the anime Kusunoki's Garden of Gods. He forms a divine pair with Fujin, the god of wind, and the two are described as twin-like beings who together govern wind and thunder. In appearance Raijin resembles a young child, with short white hair and yellow eyes, but his childlike form is misleading, as he is an ancient god whose power is genuinely immense. He also has a noted fondness for drinking alcohol, an unexpected trait for someone of his youthful appearance. His personality is free-spirited, unrestrained, and a little mischievous, yet he is kind-hearted at his core. He genuinely enjoys spending time with the human caretaker Minato Kusunoki, and in the course of the story he and Fujin sometimes act as mentors who guide Minato and at other times as older brothers teasing a younger one, bringing a lively and boisterous energy to the household.

Raijin is one of the many gods drawn to the Kusunoki estate after Minato's powerful cleansing ability purifies the property and transforms it into a comfortable sanctuary for divine beings. Unlike a formal shrine, the garden is a place where gods can relax without being worshiped from a distance or having their wild nature suppressed, and this freedom is central to why Raijin is attracted to it. His motivations are largely those of companionship and comfort: he enjoys the peaceful atmosphere, the hospitality, and especially his easygoing rapport with Minato and the other residents, and he keeps returning because the garden allows him to be himself.

In the story, Raijin serves as one of the visiting deities who enrich the daily life of the estate. In the anime's second episode, he and Fujin arrive at the garden, and in exchange for offerings Fujin grants Minato the use of wind magic, illustrating how the gods bestow blessings on the household in return for its hospitality. Raijin's closest relationship is with Fujin, his twin counterpart, and the pair are rarely apart, working together as a unit. He also shares a warm and playful bond with Minato, and through him he becomes part of the wider circle of divine residents that includes the mountain god Yamagami and the other spirits who gather in the garden. His development over the series is gentle rather than dramatic: he gradually becomes a familiar presence in the garden's everyday rhythm, and his place within the household reflects the estate's role as a haven where even the mightiest gods can feel at home.

As the god of thunder, Raijin commands thunder and lightning, while his brother Fujin commands the winds, and together their authority covers the elemental forces of wind and storm. Although the pair present an endearing, childlike appearance, their power is portrayed as truly formidable, and within the setting of the garden it takes the form of divine blessings exchanged with the humans who welcome them. Raijin's abilities, like his personality, embody the series' contrast between a cute exterior and the genuine weight of a divine being.