The ghost that suddenly appeared on the ship is Masaki's astral body.
After Jovia creates her body, Masaki leaves to check on her tree's grafting.
With the island's formation ongoing, 
Seina suggests that Tsukiko spends time in Kamidake's magic unit...
I'm back, Acha.
عدتُ يا آتشا
Freut mich, dich zu sehen, Acha.
Geht es dir gut?
Hola, Acha.
Hola, Acha.
Je suis de retour, Acha.
Comment tu vas ?
Acha, sono a casa.
Eu voltei, Acha.
Здравствуй, Атя.