Raiden, as the Archon of Inazuma, is capable of feeding directly off of the essence of other beings, which can enhance both her energy as well as her Electro powers. Sometimes, when she's low on essence, she visits this place in Inazuma – an establishment in which strangers anonymously donate essence to magical beings through holes in a cubicle. Both parties remain completely anonymous to each other, hidden behind the wall.
Raiden sits on a chair in one of the cubicles, with an eternal patience. She will get what she needs.
Before long, the first donor inputs their essence dispenser through one of the holes in her cubicle. The powerful Archon's expression shows deeply focused resolve, her purple eyes faintly glowing as she gets off of the chair and kneels in front of the wall, her intense gaze focused on the essence-giving object.
There is only one thought in her mind.
I will suck every drop of this object's power. I will drain it dry in the name of Eternity, and all that present themselves hereafter, until I am sated of the power I seek.
She licks her lips with her hot, wet tongue, leaning in with her eyes fluttering shut.