I need cake ideas

[Sam]

I think I've bored people here before talking about my real life 
Hermione and I'm off again. (sorry)

A lady was cooing over her at our local market yesterday. At least 
she was until I told her where her name had come from. I then got 
quite a telling off for giving her such an ungodly name and that 
Harry Potter would be long forgotten by the time she grew up. She 
did give her approval to my older daughter, Tabitha, as a fine 
biblical name. Not that I was at all amused by the idea of having a 
family of fictional witches of course.

I (very politely) disagreed and suggested she take a look at John 
Granger's fine book but it's stirred a few slightly mischievous 
ideas for me:)

Hermione is due to be baptised during the morning service in our 
local church later this month. I'd like to work a Potteresque 
Christian symbol into her cake decoration I think. I'm just a bit 
stuck for ideas that suit Hermione. I quite like the idea of an 
immature silver unicorn but somehow they seem better associated with 
Lily or Luna and the idea of sacrifice, faith and innocence.

I'd love to hear anyone's ideas. Something relating to intellect 
within the Christian faith maybe?
Thanks for giving this a thought for me
Sam