OOP: New Character and Ability

[Alon van Dam]

No: HPFGUIDX 62939

[Look at my, said the line, I'm spoiler free!]

The character I'm specifically referring to is Tonks. I think it's a 
real shame that we got to see so little of her. Personally, I really 
enjoyed her and found her an enormously entertaining character. I do 
hope to get to see more of her in the coming books, and not just have 
her be an introduction to the morphing-plotline, which we 
will /certainly/ see more of in later books. (I'm just debating who 
is the morph. I'm sure there has to be one, I just don't know who!)

As to Tonks' ability: Where does the limit of it lie? Can she just 
change her nose and hair? Or can she make herself look like somebody 
else? If the latter (which would make sense), how easy would it be to 
infiltrate into the other side? Is there a register of them just like 
there is of animagi? Who would stop Tonks of masking as a DE (after 
rigorous study of that DE's routines and lots of 
interrogation&veritaserum). Who would stop her?

I had some more to add to this, but have been distracted. Mea culpa 
forever ;)

Cheers,
Alon