Junpei Senou  

Giovanni, 瀬能 純平

The protagonist of the film is portrayed as having a significant amount of compassion and bravery, despite experiencing fear and discouragement just as frequently. Throughout the course of the movie, it becomes evident that Junpei has strong feelings for Tanya and enjoys drawing her. Prior to being removed from the island, they engage in a heated argument about whether she had informed her father about the supply cave they encountered earlier that day, which was taken away by her father shortly after. They part ways on a sorrowful note, never to be reunited again. In the film's conclusion, Junpei frequently references the intergalactic train as a means of comprehending life and death when he is forced to confront his brother's illness.