No. 67: Kelly Jean – Hottest Cosplay Girls
Lilith from the Borderlands series is a Vault Hunter who happens to be a Siren. No, she doesn't beckon sailors to crash their ships upon rocks, but she's so pretty that she probably has the power to lead men to their doom anyways.
Kelly Jean absolutely nails Lilith's look and looks like she's braved the harsh conditions of Pandora in style. We don't know what kind of magic causes her hair to stay like that, but it's probably the power of her own hotness.