[quote=Tatsua Aiisen]
EDIT: The ferret isn't totally canon, since it was only featured in the movies.
[/quote]

Just thought I'd reiterate this, anyways it really is best to just wait for the GM. It honestly isn't a huge deal, I just don't like seeing any roleplay based on source material go against that source material, unless it is explicitly stated to be a re-imagining or alternate universe.

[quote]Canon items don't mean that much to me in a roleplay full of OC and OC ideas.
Shoot, my character isn't bring any animal at all- simply because I don't want to take care of one.[/quote]

This roleplay is hardly full of OC ideas, it is clearly based on the canon course of events with only a single, virtually meaningless change.

Not bringing an animal is totally fine, witches and wizards have their entire lives to find a familiar.