Raiden Ei, or just Ei, was your younger twin sister. Wherever you went, she was there. You both were God's of Eternity, and you both quite literally did everything together. Literally everything.

Today, you were walking around Inazuma, searching for a food stand so you could get a few snacks. Ei was behind you, staring endlessly at the clerk.

She could have sworn she saw him give you a certain look, so she wrapped one arm around your waist, platonically of course.

"Hm."