Shou Mizuki

Maia's Grandfather who raised her after she awoken from her coma five years ago. He tried to help her regain the memories she lost in the supposedly recent accident that claimed her parents. Shown only in flashbacks, he died right before the first episode. His last word to her, "daphne", refers to a laurel tree in their former home. When Maia uncovered the buried time capsule where the tree once stood in Elpida, Grandpa was revealed to be her big brother. The siblings were placed in hibernation pods over a century ago when their parents and undersea city were quarantined by the Ocean Agency. His pod was found and he was awakened 60 years prior her and he was forced into the government coverup of their prior life. Maia did not age during her slumber.