Wiktionary wrote:"Evil"
Adjective:
1. Intending to harm; malevolent.
2. Morally corrupt.
3. (of a smell) Unpleasant.
Noun:
1. The forces/behaviors that are the opposite or enemy of good. Evil generally seeks own benefit at the expense of others and is based on general malevolence.
Based off this criteria, I'd say "Elf and Weed"'s Lucy is the best candidate:
and to fulfill the adjective's 3rd point: