Furukawa Ren

The girl that gave the clock to the protagonist. Free spirited and mischievous, and has a strong curiosity. While she obviously is a hospitalized patient that needs to convalesce, but she still has a very positive attitude. She has experienced countless numbers of traveling back in time, so she has been living for several decades by now. With the experience she has gained, she understood the concept of the future that cannot be changed. She has been separated from the protagonist for over 5 years now, but the protagonist believes that she is still alive.