Archangel

Ehhh, think about what she is...

A drug addicted murderer (in all honesty).

Velvet, awww yeah.

Mentals though. A drug that increases intelligence. Hard for me to be mad at that one.

And I prefer the term killer. Murderer means she killed innocents, or ponies who didn't deserve it. Those ponies at Arbu? (Save the foals) all deserved to die.

Plus Velvet? She's a pony who's obsessed with morals, (Refusing to kill those who'll just cause trouble later) and she refuses technology that would've helped her a lot simply to send a message to herself.

Plus, Pip did kinda do the rather 'insignificant' (SPOILERS SPOILERS SPOILERS) task of ridding the ENTIRE WORLD of radiation.