Their species have wings and tails normally.
Wings are used to absorb energy, "Null", from the air and Tails are used to store said energy
2 pairs of wings and 1 tail is the norm
Their species isn't MEANT to be able to have twins, but the "Twins" were an anomaly. As a result, things with them are off. Lynnothia has 3 sets of wings, allowing her to absorb energy MUCH faster, but she outright lacks a tail, having no place to store said energy. So she can unleash massive attacks when needed, but can't store the energy for later. Gotta use it now.
Zuuothia has 1 set of wings, preventing her from absorbing much energy, but 2 tails. So she's a stamina nut. She can go for days , but once spent she's out of commission for a long while.
Bonus: Lyn has 1 eye. Zuu has 3.