If this was a shounen series, Reene's first priority would be to get personally stronger. Actually there's no way she wouldn't already be a lot stronger at this point. She's supposed to be a miracle individual, but actually her stats aren't that high. She has as much HP as a knight, which is nothing extraordinary, and her MP is at most 50% higher than a decently talented local mage's, which is hardly something you'd boast about because we are talking about quite low numbers absolutely speaking. The bunny-girl has twice as much MP as Reene, or maybe it was even more, and she's just a travelling merchant. Maybe a relatively important merchant, but still a merchant.