Zysko is a former enemy of Ruthis and his old friends, however he recently changed due to Pamuros's rising. He doesn't meet Ruthis in this, but mainly just shows what he's been going through, and possibly some of his backstory. He's a powerful mage who gained the power of the Elemental Lords, just like his father. Although unlike his father, who controlled them with power and fear, Zysko got their trust due to the kindness that's inside of himself. They know that he may act like a villain, but it's not what he really wants.

Zysko's voice is kind of calm, and the closest thing I could put it to is maybe... Something like Zeref from Fairy Tail? Not good at describing voices, but will just put similarities I suppose. If you have another voice in mind, don't hesitate to audition~