Primary

• Usagi Best friend of Chiikawa
• Usagi Best friend of Hachiware
• Usagi Unknowingly Rival of Momonga

Extended

• Chiikawa Best friend of Hachiware
• Chiikawa Best friend of Usagi
• Chiikawa Scared of Momonga
• Chiikawa Student of Rakko
• Momonga Best friend of Furuhonya
• Momonga Rival of Usagi
• Hachiware Best friend of Chiikawa
• Hachiware Best friend of Usagi
• Hachiware Student of Rakko