Kira seems to know who Hinako really is, and wants her to give up her conquest of the school. It seems the only way for her to convince him otherwise is to fight him... and win.
That's how I responded inside 
of my head at the time.
.هكذا رددت بداخلي في ذلك الوقت
So antwortete ich
ihm damals in Gedanken.
En ese entonces, le 
contesté en el fondo.
En ese entonces,
le contesté en mi mente.
In quel momento
Foi assim que eu respondi,
 dentro da minha cabeça.
Так я мысленно ответила тебе в тот момент.