Naoto Tachibana  

, 橘 直人（ナオト）

Tachibana's brother, who assists Takemichi on his journey through time, is a police officer. Once, when Takemichi was first transported to the past and made a pledge to safeguard Hinata, he helped him travel back in time with a simple handshake. As such, Tachibana's brother serves as both a valuable source of information and support for Takemichi throughout his journey.