Ran is an upcoming tennis star who makes her appearance in episode 4 of Shigofumi. Fumika attempts to deliver a shigofumi from Ran's mother, Naoko Tateishi, to her multiple times but she continually refuses it. She does this because her mother had an affair, divorced her father and was never heard from again.
Eventually she accepts the letter but refuses to open it. The issue intensifies and begins to affect her focus on the court and with her tennis club. Her girlfriend, Nanae Yotsugi, eventually convinces her to read the letter. Ran is shocked to find numerous photos and stories from her mother about how she always went to her tennis matches and was cheering her on from the sideline all throughout her life. This softens Ran's views and she makes her peace with her mother.