Tetsu Totsumura

Tetsu Totsumura (凸村 哲, Totsumura Tetsu) is a police officer who works at the police station on Hitogashima. He is so lighthearted that it is hard to believe that he is a police officer.

Appearance
Tetsu is an adult man with messy orange hair. He is usually in his police uniform and wears yellow glass sunglasses.

Plot
The evening of Ushio's funeral, Tetsu sees Mio standing in front of her house and looking inside.

The next day, he misses breakfast and goes at lunch at Kofune's dinner and orders the usual. Mio takes his order and wonder why he didn't came in the morning and Tetsu explains that the whole Kobayakawa family is gone, making him believe that they had a debt and ran in the middle of the night.

On the second time Shinpei arrived on Hitogashima, he goes outside to take some fresh air. There he sees when Tetsu found Mio staring at her house. Tetsu wonders what is she doing, but Mio then kills him with a kitchen knife. She then produces a shadow, which copies Tetsu's appearance and takes on his identity. Mio wants Tetsu's gun, making the Shadow realize, she has not yet killed the real Mio.

On the third time, in the evening, Shinpei calls Tetsu and reports a fake fight. As Tetsu goes to check out the fight, he avoids meeting Shadow Mio. The next day, Tetsu gets called to investigate the missing Kobayakawa family. He later goes to Kofune's Diner and sees Shinpei, ready to scold him for the fake fight report, but Shinpei asks him if he wants the usual and Tetsu confirms. Tetsu reveals the Kobayakawa family is gone and that a detective will be coming from mainland this evening. He then gives to Shinpei a phone that Ushio had left him and told him to give to Shinpei if something where to happen to her, a day before she died.

Etymology

 * The name Tetsu means "philosophy" (哲).
 * Tetsu's surname Totsumura means "convex, beetle brow, uneven" (凸) (totsu) and "town, village" (村) (mura).