Tough on the Outside... Marshmellowy on the Inside

[Sheila]

Voted for Logan Echolls, he can be so tough and so vulnerable at the same time.

Veronica is a good choice too, she appears to be very strong psychologically but then there are major meltdowns, especially when it comes to Logan and her father.

I don't find Weevil all that believable neither as a "marshmallow" nor as tough.
For the marshmallow bit, I don't recall him ever being all that sweet and there are all the crimes.
And I don't buy him as tough because he's a dwarf, he has a silly moustache and in most of the fights he got into he had 10 or 15 guys behind him. Also, he started being made fun of by everyone after he was booted from the gang.

[comptonassmel]

I picked Veronica, of course. One example: she puts up the tough front after Logan breaks up with her in season three, then breaks down when she gets home. Albeit her tough front for her friends wasn't very tough, but still.