Anastasia
She was really spent too, not just because of the drained blood, but because this day was honestly one of most intense, tension wracked and unauspicious days she had experienced so far. Maybe she ought to take some rest too, but not before taking a shower to clear her thoughts. Yup, a cold shower would do her good in this situation.
While she soaked her body in the cold water, she reflected on her situation: she might have taken potentially a rather strong ally as an apprentice, but this didn't increase her chances much. Medaka and Anastasia were both 'monstrous' in their own way, but assuming the worst case scenario, they were disadvantaged in quantity alone. The giant metallic man, the demonic abomination, and possibly the other mage. Taking at least two more 'allies' and making sure they face only one of them at a point would be the bare minimum strategy. She would talk with Medaka how much the vampire who turned her would be inclined to interfere, for starters, as well as about her other potential acquaintances.
Anyway, her shower was done. She changed into a fresh of set of jeans and T-shirt and decided to just fall on her bed and nap as well. That'd be the most efficient course of the action. And then some food after she would wake up.