Primary

• Diarmuid Ua Duibhne Servant of Kayneth El-Melloi Archibald
• Diarmuid Ua Duibhne former friend of Fionn mac Cumhaill
• Diarmuid Ua Duibhne former lover of Grainne

Extended

• Kayneth El-Melloi Archibald Master of Diarmuid Ua Duibhne
• Kayneth El-Melloi Archibald Enemy of Kiritsugu Emiya
• Kayneth El-Melloi Archibald Husband of Sola-Ui Nuada-Re Sophia-Ri
• Fionn mac Cumhaill former friend of Diarmuid Ua Duibhne
• Fionn mac Cumhaill Former husband of Grainne
• Grainne former wife of Fionn mac Cumhaill
• Grainne former lover of Diarmuid Ua Duibhne