Mariko Sakai

After having met with her half-sister, Sana had intended on not seeing her again, saying she didn't feel a familial bond. Mariko one day wanders off from her parents in search of her when hearing she is shooting nearby. She doesn't get to meet her again, but does spend much of the day with Zenjiro, whom she annoys greatly. Despite her being a pest to him, he searches for her parents in his car, who upon finding them, attack him thinking he is her kidnapper. When the misconception is cleared, Zenjiro is relived to give her away, but she is less mean to her.