I still think the elf is the evil one in this situation. next chapter is going to be the fight with banter about the elf and her potions that will let fly girl say what the potions do and make witch stop to examine the potions for the first time and ends with ether elf girl running away or doing that guilty index finger touch thing while trying to explain her reasons
Beelzebub clearly likes those potions if she's been sneakily drinking them for a while, so we already know this is just a comedy of idiots miscommunicating.
The question is, how funny is it going to be when it comes to a head?