It's world changing to most, indeed. That's why as Marti said, denial and pass a dimension hopper off as looney are legitimate answers. If someone in real life just hopped through a portal saying that they come from the future/past/alternate universe, my world would shatter in one mili second.
Now, to people who see weirdness on an almost constant basis? They will not be wholly shocked. They will give it the benefit of doubt too, in case. Instead of Leanne, let's...call a character named Adventurer McDonaldson. His life is a parade of daily weird crap. As a baby, he crossed through a void gate because their parents were cultists. As a child, he saw the summoning of Leviathan because one of those void gate landed him exactly on the spot where the thing was happening. As a teenager, he sees a fisher ICly landing a create named the Nepto Dragon using only a fishing rod. As an adult, he finds our mysterious traveler, Dimension Bunny Hooper. Will he be shocked? Or just treat it as another weird occurance in his already weird life?
Yes, the examples are ludicrous, but that's one of the major points. There are several cases of the extraordinary happening, not only from in-game events, but from other players too, which sometimes manages to fall within the purview of lorewise possible, but still extraordinary feats. And for those that have seen it, a dimension traveler will be just another weird thing in a world that is already very, very weird.
That's my opinion, at the very least.
Now, to people who see weirdness on an almost constant basis? They will not be wholly shocked. They will give it the benefit of doubt too, in case. Instead of Leanne, let's...call a character named Adventurer McDonaldson. His life is a parade of daily weird crap. As a baby, he crossed through a void gate because their parents were cultists. As a child, he saw the summoning of Leviathan because one of those void gate landed him exactly on the spot where the thing was happening. As a teenager, he sees a fisher ICly landing a create named the Nepto Dragon using only a fishing rod. As an adult, he finds our mysterious traveler, Dimension Bunny Hooper. Will he be shocked? Or just treat it as another weird occurance in his already weird life?
Yes, the examples are ludicrous, but that's one of the major points. There are several cases of the extraordinary happening, not only from in-game events, but from other players too, which sometimes manages to fall within the purview of lorewise possible, but still extraordinary feats. And for those that have seen it, a dimension traveler will be just another weird thing in a world that is already very, very weird.
That's my opinion, at the very least.
"Forever walking forward, towards the ever distant horizon."
-Leanne Delphium