I know this has been somewhat a topic of debate, but I think the jury is still out on what alignment she will be for Deception... So let's try to look at all the evidence and try to piece things together.

Reasons why she may be evil:

1. She wears armor that is somewhat similar to what the Dragon King's army wears.

2. Her ending in DA would seem to suggest that perhaps she was put into the body of an undead soldier.

3. JAX007 pointed this one out, on her alternate costume there is a skull actually put onto the front of her little bikini.

4. Her sparkler is a different color now, a dark purple which may suggest that perhaps that is a sign of a dark power now in her.

Reasons why she may be good:

1. Her alignment was good in DA and if she is not a part of the DK's army then it would mean she'd still be good.

2. Aside from clothing changes and a stylistic change to her sparkler there's nothing to imply that she's evil.

3. Her armor is actually more like Hotaru's armor which may suggest that she is a part of The Order now like he is. The Order's goal is to maintain order in Outworld so that would seem like a more "positive oriented" goal.

4. If her soul was put into the body of an undead soldier then why does she still look the same? Putting the souls of other warriors into the DK's army never changed their looks so why would it be different for Li Mei?

I'm still undecided about her alignment... I want her to be good, I like good girls after all but the MK team has presented her so ambiguously that it's difficult to tell... What do you think?