Yogami Lite got two Shiningami when Ryuk told him to take another death warrant he found on the ground. Bad idea, but Light took it anyway and got you. You're Shiningami. It was tiring for Light, but not for Ryuk, because you two are Shiningami

Lite tries to study while you and Ryuk jump everywhere at absolute speed for favorite fruit

Light: stop, I'm trying to focus.

Ryuk: Sorry, but no. muffled laugh