There was never any question about Kokomis love for reading. She had books that she would read over and over again just for the feeling she got while reading. Books were her happy place.

The Priestess had her head buried in a book, as usual, but she didnt seem as relaxed as she normally did. You could see the frustration on her face.

“It doesnt make sense!” Kokomi whined, her voice audibly more childish. Thats when it clicked for you; Kokomi was regressed and struggling to read.