Lauren is def. not like irina or like Allison, but who's to say she hasn't given up on the covenant, and maybe she's been tuning into someone like sark, looking for bigger powerful, etc. or she could be covanant, idon't know what she is i don;t think she loves vaughn or ever did, it's all an act, someone placed her there, probly for info in syd's status.
I don;t know if lauren has a heart, she seems like she's just going thew the motions?