Primary

• Haruka Doumeki Grandfather of Shizuka Doumeki

Extended

• Shizuka Doumeki Best friend of Kimihiro Watanuki
• Shizuka Doumeki Friend of Himawari Kunogi
• Shizuka Doumeki Grandson of Haruka Doumeki
• Shizuka Doumeki In love with Kohane Tsuruyi