It should be noted that in "Vows" younger Demona is disgusted with her future self and helps Goliath defeat her future counterpart, so she didn't seem to be always evil:
[In the past Demona is conversing with her past self]
Modern Demona: [Referring to Young Goliath who's wounded] Believe me I know exactly how you feel. But you cannot trust him. He's weak. He cares more for the humans than for our clan. The greatest favor you can do him would be to put him out of our misery forever! You must know I'm right. Can't you see I'm right? I am what you will become!
Tenth Century Demona: I will never be like you!
Modern Demona: I do not wish to hurt you.
Tenth Century Demona: And I do not wish to be you!
It should be noted that in "Vows" younger Demona is disgusted with her future self and helps Goliath defeat her future counterpart, so she didn't seem to be always evil:
[In the past Demona is conversing with her past self] Modern Demona: [Referring to Young Goliath who's wounded] Believe me I know exactly how you feel. But you cannot trust him. He's weak. He cares more for the humans than for our clan. The greatest favor you can do him would be to put him out of our misery forever! You must know I'm right. Can't you see I'm right? I am what you will become! Tenth Century Demona: I will never be like you! Modern Demona: I do not wish to hurt you. Tenth Century Demona: And I do not wish to be you!
Edited by mspence