Okay, so like I said: here a list of O.W.L.s:
Marina:
Astronomy: → (E)
Care of Magical Creatures: → (O)
Charms: → (E)
Defence Against the Dark Arts: → (O)
Divination: → (E)
Herbology: → (E)
History of Magic: → (A)
Muggle Studies: → (O)
Potions: → (O)
Study of Ancient Runes: → (O)
Transfiguration: → (O)
Carmen:
Arithmany: → (O)
Astronomy: → (A)
Care of Magical Creatures: → (O)
Charms: → (O)
Defence Against the Dark Arts: → (O)
Herbology: → (O)
History of Magic: → (A)
Muggle Studies: → (E)
Potions: → (O)
Study of Ancient Runes: → (E)
Transfiguration: → (E)
Fred:
Astronomy: → (P)
Care of Magical Creatures: → (E)
Charms: → (E)
Defence Against the Dark Arts: → (E)
Herbology: → (P)
History of Magic: → (D)
Muggle Studies: → (A)
Potions: → (P)
Transfiguration: → (E)
George:
Astronomy: → (P)
Care of Magical Creatures: → (E)
Charms: → (E)
Defence Against the Dark Arts: → (E)
Herbology: → (E)
History of Magic: → (D)
Muggle Studies: → (A)
Potions: → (P)
Transfiguration: → (P)
Angelina:
Arithmancy: → (E)
Astronomy: → (P)
Care of Magical Creatures: → (E)
Charms: → (E)
Defence Against the Dark Arts: → (E)
Herbology: → (E)
History of Magic: → (D)
Muggle Studies: → (E)
Potions: → (O)
Transfiguration: → (P)
Patricia:
Arithmancy: → (O)
Astronomy: → (A)
Care of Magical Creatures: → (E)
Charms: → (E)
Defence Against the Dark Arts: → (E)
Herbology: → (E)
History of Magic: → (A)
Muggle Studies: → (E)
Potions: → (O)
Transfiguration: → (A)
Percy (naturally):
Arithmancy: → (O)
Astronomy: → (O)
Care of Magical Creatures: → (O)
Charms: → (O)
Defence Against the Dark Arts: → (O)
Divination: → (E)
Herbology: → (O)
History of Magic: → (O)
Muggle Studies: → (O)
Potions: → (O)
Study of Ancient Runes. → (O)
Transfiguration: → (O)
Charlie:
Astronomy: → (P)
Care of Magical Creatures: → (O)
Charms: → (E)
Defence Against the Dark Arts: → (E)
Herbology: → (E)
History of Magic: → (P)
Muggle Studies: → (A)
Potions: → (E)
Transfiguration: → (P)
Elias:
Arithmany: → (O)
Astronomy: → (O)
Care of Magical Creatures: → (E)
Charms: → (O)
Defence Against the Dark Arts: → (O)
Herbology: → (E)
History of Magic: → (O)
Muggle Studies: → (E)
Potions: → (O)
Study of Ancient Runes: → (A)
Transfiguration: → (E)
David:
Arithmany: → (A)
Astronomy: → (O)
Care of Magical Creatures: → (E)
Charms: → (E)
Defence Against the Dark Arts: → (O)
Herbology: → (E)
History of Magic: → (A)
Muggle Studies: → (O)
Potions: → (O)
Study of Ancient Runes: → (E)
Transfiguration: → (O)
Dora (Tonks):
Astronomy: → (A)
Care of Magical Creatures: → (E)
Charms: → (E)
Defence Against the Dark Arts: → (O)
Herbology: → (E)
History of Magic: → (P)
Muggle Studies: → (D)
Potions: → (O)
Transfiguration: → (E)
Bill:
Arithmancy: → (O)
Astronomy: → (A)
Care of Magical Creatures: → (E)
Charms: → (E)
Defence Against the Dark Arts: → (E)
Divination: → (A)
Herbology: → (E)
History of Magic: → (A)
Muggle Studies: → (E)
Potions: → (O)
Study of Ancient Runes: → (E)
Transfiguration: → (E)
Bianca:
Arithmancy: → (O)
Astronomy: → (A)
Care of Magical Creatures: → (E)
Charms: → (E)
Defence Against the Dark Arts: → (E)
Herbology: → (E)
History of Magic: → (A)
Muggle Studies: → (E)
Potions: → (O)
Transfiguration: → (E)
Let's not for get I made that all up, yes? But that's my head-canon, so...