Then of course, there was the white witch.

Here are the way some illustrators thought she looked. Which one is closest to your ideas?

Once the Queen of Charn, Jadis is unwittingly freed from her own magic spell by Digory. Unfortunately, having freed her, Digory and Polly cannot then get rid of her, and she comes back with them to London. The children know she must be returned to Charn as soon as possible, but on reaching Narnia first, the evil sorceress is confronted by Aslan and flees to the north of the newly created land. Later she conquers Narnia, ruling through cruelty and terror, and it is into this land, where it is always winter, that Lucy and Edmund come from the wardrobe... and where Edmund becomes her captive.

In the Voyage of the Dawn Treader, one of the main characters is Reepicheep, the brave mouse.

REEPICHEEP is a Talking Mouse of Narnia who fights bravely at the great Battle of Beruna and afterwards sails to the End of the World with King Caspian. Reepicheep is tall for a mouse (when he stands on his hind legs), and he twirls his whiskers elegantly as though they are a moustache. Armed with a rapier at his side, Reepicheep is scared of no one and nothing!

ASLAN, the Great Lion, is the founder of Narnia. The name (pronounced Ass-lan) means "lion" in Turkish, and came from the book Tales from the Arabian Nights which C.S. Lewis used to read as a child.

Unlike any other character in the Chronicles, Aslan appears in all seven books - but he only comes when Narnia is in terrible need, as when Edmund's life is in danger in The Lion, The Witch and The Wardrobe. Aslan is a huge and terrifying lion (though, when he wants to be, he is gentle and playful) and has such great magic at his command that he is able to defeat the White Witch, just when she thinks she's got the better of him!