Ruchika, a gentle-hearted hedgehog, inhabits Ferrier—a hidden realm accessible solely to believers. She expresses her personality through jam-making and singing, always balancing an apple on her head during activities. Her daily routine involves foraging for ingredients like mole soles and red currants to craft her signature red, sweet jam.

She coexists harmoniously within a community of diverse creatures, each in personalized homes, reflecting themes of gentle friendship and compassion. Her collaborations include Sol, a timid mole whose shovel invigorates plant growth; Boschniakia rossica, a large fish traveling with rainfall; Nico, a ladybug collecting forest sounds in a pochette; the culinary-skilled cat sisters Lucre and Kupru; and a fairy sea perch juggling while wearing rabbit headgear.

Ferrier’s slightly mysterious forest setting frames Ruchika’s story, rooted in providing comfort and hope to those experiencing sorrow. While broader series media explore Ferrier through illustrated books and fairy tales, Ruchika’s portrayal consistently emphasizes kindness and nurturing bonds among inhabitants.