Since I've been slowly uploading them I guess I'll make a list.
Missing Character Quests:
6*
Alpinia
Black Baccara
Cattleya
Mei Plumblossom
Pumpkin
Saffron
5*
Apple of Sodom
Gerbera
Holly
Monotropastrum
Setaria
As a side note: While Oncidium doesn't have her own folder for them her character quests are actually uploaded they're just attached to her "Love" scene vid.