I dunno what houhou is, but 異世界人 = いせかいじん = someone from a different world [dimension, timeline, reality], 異星人 = いせいじん = someone from a different planet.
She says いせかいじん out loud in the anime.
I wouldn’t be surprised to see the opposite furigana on each in some situations to provide a nuance of overlap, the way Japanese writings are prone to do, but.







Excited to follow along. よろしく!