Helena

Helena is an Earth type magic attacker. Her +35% INT buff VC is the same as Levia's and increases not only magic attack damages but also healing amount.

Her non-elemental single-enemy magic attack has -25% physical resistance debuff, which I keep it in mind to use before activating Another Force. The total amount of physical resistance debuff along with Cyrus' VC is 30% (25% + 25%*20%) at maximum.

The side story dedicated to her promotion to 5 star, Closed Miniature Garden and the Rebel under Blue Sky (JP ver. 1.9) is so sweet. She was a key member at the final battle of Volume II of the main story Part II (Return of Time Goddess).