User blog comment:Sung5614062/When did Celine appear in th anime?/@comment-50.100.250.143-20150306213905

The manga explains how Celine became human. I'll explain what I remember reading about it a long time ago.

Celine started off as a flower plant (a gift to Rito, I do believe). He took care of Celine since he's always taking care of the garden at his house. Overtime, Celine starts to become ill. The only way to cure her is by finding that cure on another plant. When they get back to Earth, they find Celine (who appears to be dead). However, she cracks out a shell to show she is now in human form. There is one chapter in the manga where she becomes a teenager (for a short time) from the moonlight shining on her.

Oshizu's body is created by Ryoko Mikado. Her body was made for the sole purpose to allow her to live a normal life. I forget how the body was created in the manga though.

Correct me if I'm wrong. I haven't read the manga for a year or two.