One character can only have a maximum of 5 levels of support at once.

C is the first level, counting as 1 level of support
B is the second level, counting as 2 levels of supports
A is the third and final level, counting as 3 levels of supports

Optimum combinations can include:

• 1 A and 1 B
• 1 A and 2 Cs
• 2 Bs and 1 C

And so on…

These are the individual bonuses for 1 level of support:

Fire: Attack + 0.5, Accuracy + 2.5, Avoid + 2.5, Critical + 2.5
Thunder: Defence +0.5, Avoid + 2.5, Critical + 2.5, Critical Evade + 2.5
Wind: Attack + 0.5, Accuracy + 2.5, Critical + 2.5, Critical Evade + 2.5
Ice: Defence + 0.5, Accuracy + 2.5, Avoid + 2.5, Critical Evade + 2.5
Dark: Accuracy + 2.5, Avoid + 2.5, Critical + 2.5, Critical Evade +2.5
Light: Attack + 0.5, Defence + 0.5, Accuracy + 2.5, Critical + 2.5
Anima: Attack + 0.5, Defence + 0.5, Avoid + 2.5, Critical Evade + 2.5

Notes: Attack equals both physical and magical, while the same thing for Defence.

To get the full bonus (for two characters), you must add up the bonuses for both affinities and multiple them by the level of support.

Example: C Support between Fire and Ice affinity characters

Full bonus = (Attack + 0.5, Accuracy + 2.5, Avoid + 2.5, Critical + 2.5) + (Defence + 0.5, Accuracy + 2.5, Avoid + 2.5, Critical Evade + 2.5)
Full bonus = Attack + 0.5, Defence + 0.5, Accuracy + 5, Avoid + 5, Critical + 2.5, Critical Evade + 2.5

Final decimals are omitted so…

Full bonus = Accuracy + 5, Avoid + 5, Critical + 2, Critical Evade + 2

Example: A Support between Fire and Ice affinity characters

Full bonus = 3 x (Attack + 0.5, Accuracy + 2.5, Avoid + 2.5, Critical + 2.5) + 3 x (Defence + 0.5, Accuracy + 2.5, Avoid + 2.5, Critical Evade + 2.5)
Full bonus = (Attack + 1.5, Accuracy + 7.5, Avoid + 7.5, Critical + 7.5) + (Defence + 1.5, Accuracy + 7.5, Avoid + 7.5, Critical Evade + 7.5)
Full bonus = Attack + 1.5, Defence + 1.5, Accuracy + 15, Avoid + 15, Critical + 7.5, Critical Evade + 7.5
Full bonus = Attack + 1, Defence + 1, Accuracy + 15, Avoid + 15, Critical + 7, Critical Evade + 7