Ren is haunted by the deaths of his party members in a failed attempt to defeat the Spirit Tortoise, and doesn't want to believe that he might be responsible for what happened.  Myne seems ready to take his side and support him, but...
I realized why you were suffering.
أدركتُ سبب مُعاناتك
Ich verstehe, warum du so sehr leidest.
Ya sé por qué lo estás pasando mal.
Ya sé por qué lo estás pasando mal.
J’ai compris
ce qui cause votre douleur.
Ho capito perché soffrivi.
Eu percebi que estava sofrendo.
Я наконец поняла,
почему тебе так тяжело.