Kayden Break

Kayden is the deuteragonist in the manhwa, Eleceed. He is infamously known as one of the strongest awakened ones who remains unaffiliated with an organization. Due to being heavily injured and needing to hide as he healed, he was forced to transform into a cat and can only maintain his human form by spending his energy.

His main ability is Electrokinesis, though he can also transform into a cat and use Spatial Isolation. Currently, he's living with Ji-woo as he recovers his power and energy. He's teaching Ji-woo about the awakened world and acting as his mentor.

(Source: Eleceed Wiki)