[X] (Honest To Fox) Write-In - If we can't weaponize a combination of social anxiety and supernatural charisma to avoid answering awkward questions whose answers aren't actually as important as the asker thinks they are, until the question-asker has been distracted and maybe forgotten the topic, what kind of succubus even is Senaz?
[X] (Helen's Flirt response) Respond positively to the idea of a date - she's cute, she's not evil, she's in the same isekai'd boat as you, and you're likely going to spend a lot of time together, so dating is within the range of possibility.
[X] (Helen's Flirt response) Tell her that if she wants to seduce you, she'd better use magic for it and do it responsibly if she wants to be good when it wears off.
[X] (Fluffy Tail?) Spin Eira around and put her in the Marshmallow Purgatory - you're not sure where the Red Queen got that name for "shove someone's face in your cleavage" from, but it's marvelously effective as long as they're sexually attracted to you, which she seems to be.
[X] (Helen's Flirt response) Firmly turn down the date request, but let her know you get it and are cool with her doing so, especially given she did so without her powers.
[X] (Fluffy Tail?) Don't offer, just go straight to the charm and get her to calm down first - Helen will probably excuse you doing so as long as you limit the use to cooling the situation. Then figure out what's next.