Rain learns that she's been feeling so cold lately because her body is trying to revert to its kappa origins. The doctor warns her to avoid catching a chill, but when Ryo is dragged into the river, she can't stop herself from diving in after him.
That old habit is resurfacing 
in your body right now.
.إنّ تلك العادة القديمة تتجلّى في جسدك الآن
Und dieser alte Brauch hat sich
nun bei Rein-sans Körper gezeigt.
Esa antigua costumbre
ha vuelto a aparecer en tu cuerpo.
Esa antigua costumbre
ha vuelto a aparecer en tu cuerpo.
Et ton corps est en train de manifester
cette vieille pratique.
Questa antica abitudine
sta facendo di nuovo capolino in te.
Agora esse antigo hábito está
ressurgindo dentro de seu corpo.
И эта особенность предков
проявилась в твоём организме.