Samhen is a kindhearted young boy who transfers into Kei and Kelly's class. He remains notably shy and hesitates to discuss himself, frequently avoiding direct communication. To bridge this gap, he depends on Jack, a small, talkative AI robot companion. Jack actively voices Samhen's thoughts and facilitates his interactions with others, creating a complementary dynamic with Samhen's quiet nature.

He lives with his mother. When a sudden emergency threatens the town, Samhen joins Yoji, Kei, Kelly, and their robot Oscar in protective efforts. His participation underscores his capacity for cooperation in critical situations and emphasizes the vital bonds between humans and AI that motivate the rescue.

As a transfer student in a new environment, his initial reserve presents a challenge. Jack's support proves essential for both daily interactions and his integration alongside the other children. Samhen's actions during the crisis demonstrate his willingness to help protect others despite his typically reserved personality.