Serious

"Awaken! Ice Transformation (Lightning Possession)!"

A pair of ice wings appeared on Noel's back and an ice crown hovered above Noel's head. Anna had her eyes and hair turn white as the lightning covered her entire body. 

Evan couldn't help but smile in excitement. This was what he had been waiting for. Their strength was amplified and it was clear that there was no side effect from using it.

And as he expected, since both of them were working together, Noel also had the same ability.

"There is no holding back," Noel said while stabbing the ground with his sword.

Ice crystals began to emerge from the ground. They continued expanding as more and more appeared, moving to the duke's location. 

"Of course." Evan smiled while lowering his sword. His expression turned solemn as though he were treating Noel as his equal in this fight.