Odd that they're speaking in past tense even though this all is supposed to take place before Mokou's immortality? Or was something just mistranslated at some point...
But that will be such an emotional burdenMoko...>Focus<and will wait for eternity.Will become immortal to meet her friend again,Her immortal lifespan will crush such emotion.for someone as weak as her.Her wish...will need more than feelings.