Potential partners for each EN(other ENs only):
Kiara - Mori, Nerissa, Ame, Mumei
Mori - Kiara, Gura, Kronii, Bae, IRyS
Ina - Kronii, Fauna
Ame - Gura, Mori, Kiara, Mumei
Gura - Ame, Kronii
Bae - Mumei, IRyS, Mori, Fauna
IRyS - Bae, Kronii
Kronii - Mumei, Fauna, IRyS, Gura, Mori
Fauna - Kronii, Mumei, Bae, Ina
Mumei - Bae, Fauna, Ame, Gura, Kiara, Bijou, Nerissa, IRyS
Fuwawa - Mococo
Mococo - Fuwawa
Shiori - IRyS, Nerissa
Nerissa - Kiara, Shiori
Bijou - Mumei, IRyS
I'll admit I don't have a handle on most of Advent.