Shito Tachibana 橘思徒

He returned to life as a zombie following the same accident as Chika. Because he was reported in the news as "Boy A" at the time, he is secretly nicknamed "A-kun" at school.

He is intelligent and aloof yet somewhat of an airhead, and also displays *tsundere* tendencies. While he makes sharp remarks, he rarely listens to what others say. He is popular with the girls and is something of a school idol. He is left-handed, a poor singer, sensitive to the cold, and fond of long baths. When drunk, he becomes a nuisance to others. He loves tropical fruits. He can be incredibly high-strung one moment and shockingly thick-skinned the next—a contrast that often sparks arguments with Chika. He collects a type of doll named "Betty" that bears a striking resemblance to the "Peko-chan" mascot.

Upon his resurrection, Chika's right wrist was attached to his body. By swapping right wrists with Chika, he can manifest a handgun made of ectoplasm, though he is subject to the same limitations as Chika. Furthermore, his wrist aches whenever something untoward happens to Chika; consequently, the two share a bond of "shared destiny." Although he initially disparaged Chika—calling him a "moronic monkey"—he has come to regard him as someone precious after overcoming various incidents together.