Lotus kepp getting more and more suspicious.
Since the Saintess name was Edelweiss, the human and the spirit name are Lotus and Lilac; what would be the name of the girl we still know nothing about? Iris? Lily? It seems the name of a flower is a pattern in this manga.
Edit: apparently some of the Japanese names are also based on flower. Sakura obviously being Sakura/cherry blossom, Kikyou is balloon flower, Karen... her name is Ka(火/fire) Ren(恋/love), I can't find a flower that goes by that name, probably not a flower reference.
The boys name are also, unfortunately, not a flower reference.