So, what're your characters weapons and deadly skills?
Sweet, "innocent" Lovia is able to mess with nerves, organ, blood cells, the brain, etc. So she can screw you up pretty badly. With her fire abilities she could also fry braincells or blood. Even with the same abilities , minus fire , I think Angel wouldn't stand a chance against Lovia.
I'm pretty sure Angel would be too much of a good girl to play with organs. That's what Lovia goes straight for.
As for Reina, who may or may not be dead, she has guns + mind control. Reina's guns = SIG P239 and H&K P7.... yeah, I'm a little bit of a gun freak.
Oli, who is the same as Reina when it comes to being alive or not, can freeze any moisture and control the ice. So, in a fight between all my characters I'm pretty sure Lovia would have everyone dead within six seconds.