Zen Kamioka

Zen Kamioka (上岡 善) is a man who just joined Arata Kaizaki's former company who visits Michiru Saiki's grave from time to time.

Arata Kaizaki's action to leave the company after the death of Michiru Saiki has made a positive influence over him and made him admire him.

Etymology

 * The name Zen means "good" (善).
 * Zen's surname Kamioka means "above, top, upper" (上) (kami) and "ridge, hill" (岡) (oka).
 * Kamioka is an homage to the Kamioka Station in Ōita, Japan.