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...
And that's why you should 
live and keep fighting,
ولهذا السّبب ينبغي أن تعيش
،وتستمرّ في القتال
Per questo devi continuare a vivere e a combattere 
per compensare le cose che hai perso.
Por isso mesmo, você precisa se
esforçar pelo que se foi também,
Поэтому живи! Продолжай бороться.