Anastasia and Allen may clash at some point.
Sure, smug orc-slaying Anastasia at the end of chapter 25 is absolutley astonishing... but also frightening. Especially as she so blatantly states her intention to
keep up with the Jones catch up to Allen's level. The next step for her is probably overconfidence, or even arrogance. I'm afraid some coined rivalry may then develop between the two. Add a pinch of sexual tension, and you get the perfect recipe for a huge time bomb (also a classic trope in that kind of stories)...
On one side, we would have an eager Anastasia constantly trying to one-up her teammates and overdo everything. On the other side, an Allen trying to curb her enthusiasm for her own sake. It would quickly become too late to peacefully de-escalate the situation, so...
They would have a brawl.
I don't think firearms would be involved. Magic possibly, at worst. But I can foresee at least some cuts and bruises on each side.
Followed of course by their inevitable and definitive reconciliation.
PSA: take your insuline, massive sugar overdose expected.