Primary

• Rem Twin Sister of Ram
• Rem In love with Subaru Natsuki
• Rem Daughter of Temae
• Rem Daughter of Quark

Extended

• Subaru Natsuki Friend of Otto Suwen
• Subaru Natsuki In love with Emilia
• Subaru Natsuki Partner of Beatrice
• Subaru Natsuki Friend of Petra Leyte
• Subaru Natsuki Friend of Reinhard van Astrea
• Subaru Natsuki Rival of Julius Euclius
• Ram Twin Sister of Rem
• Ram Rival of Frederica Baumann
• Ram Subordinate of Roswaal L. Mathers
• Ram In love with Roswaal L. Mathers
• Ram Subordinate of Emilia
• Quark Father of Rem
• Quark Father of Ram
• Temae Mother of Rem
• Temae Mother of Ram