Hanako- Hanako’s colors are red, black, and yellow. His charms are a knife, his haku-joudai (the red and green orbs), a mokke carrying candy, a skull, and a red moon in reference to his dream as a child.
Nene- Nene’s colors are teal, brown, silver, and pink. Her charms include a fish, a mermaid, a daikon radish, a mokke carrying candy, and a skull.
Kou- Kou’s colors are teal, orange, and sky blue. His charms include a mokke carrying candy, his exorcism staff, a camera to represent Mitsuba, a clock in reference to the four o’clock library in the story, and an orange star.
Mitsuba- Mitsuba’s colors are pink, teal, and yellow. His charms include a camera in reference to him taking pictures around the school with Kou, a mokke carrying candy, a scarf, a small dagger, and a mirror to represent the hell of mirrors.
Tsuchigomori- Tsuchigomori’s colors are purple, maroon, and black. His charms are a pair of glasses, a mokke carrying candy, a spider to represent his spider-like character design, a pair of pointy teeth to represent his own, a pipe, and a book in reference to the four o’clock library and the books of everyone's lives you can find within the library.