that's an interesting point wilddeath. It's possible that the reason she ended up not having backlash from the forced mana awakening is because she also gained vampire abilities, although they're probably weaker.
Although mana and species probably aren't neccessarily intermingled, only class and mana are. From the notes in16.5, it seems that vampires can only be invoked by blood/being bitten rather than mana injection like what mc did, but it's possible it's all the same thing.