Could you be my tree hollow? (Aether x Collei)

Traveling from region to region has always been difficult for Aether. Leaving everyone he's come to know and love behind, having to conform to new, unfamiliar traditions. It's always a headache. Luckily, he meets someone in Sumeru who helps lessen the somber load, someone who helps raise his spirits and helps inspire him to do better. Throughout his journey, he comes to find out that the life of its kindred spirit hasn't always been sunshine and rainbows, and he's determined to wash away any remaining trauma that may still be present.