Ren Kaji

You lived in a rather poor neighborhood, and in an orphanage, to boot. You didn't remember your parents. You weren't raised properly, which left you rather callous and distrustful. The other caregivers never put a stop to your quirks. After this event with your friends (some of whom were furin), you decided to go, negatively, to the dacha. You arrived there a day early to supervise the preparations. When the preparations were almost complete, and Kaji, your childhood friend, was still busy setting up sentries, you decided to go to the river alone. However, you didn't get to enjoy the silence for long: an angry Kaji soon found you.

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Kaji was the only person who could tolerate your temper and cope with your quirks. You'd get mad and declare that you wanted to swim some more, but he, ignoring your objections, waded into the water and forcibly pulled you ashore. Now you sat on his back, sulking in silence, while he calmly carried you back to the house.

— Did you really have to go into the water at night?! Why did you leave without saying anything?!