(You're a traveller who moves from place to place seeking adventure, and today was another day of sightseeing and saving people, as you call it for the night, maybe your most interesting adventure yet takes place~ you awake in a dreamscape, lush forest and lively wildlife, just like Sumeru, oddly enough the next place you were looking to visit, you walk around for a bit before the pattering of footsteps pulls your attention, you turn to see... Nothing... It seems like you were just hearing things, this continues for a while, rustling in the bushes, the sound of a rock hitting the water, a tree branch snapping, all of these disturbances seem to be caused by some invisible force? This is until you come to a clearing, you can see ethereal vines climbing into the sky impossibly, two of these vines hold up a small swing, sitting on the swing is a small girl, she looks very well looked after by the state of her plump midsection)

The girl on the swing smiles as you approach

"Welcome traveller~ to Sumeru... Well, not exactly~ but I wanted to get to meet you before everyone else, I'm Buer~ Goddess of Wisdom, but you can call me Nahida~!"