Oh my God I could've sworn Utsugi and Kaname were the same character.
Jesus, literally everything about the twins is so difficult to keep track of. Suddenly I can't recall which sister is living which life with which people @_@
I thought you were on the verge of a conspiracy theory with that first part.
Regarding, the second… They go to two different schools and have two different vibes (the twins). Utsugi is childish and feels somewhat naive, at times. Kaname is also quite childish, but is like a gyaru and has like a hidden dark side or something. I thought it would be easy to type the differences, but they are kind of alike on a surface level. Regardless, I think I mixed the twins a little at the start of the series myself.
What I really want to see, though, is Hiiragi interacting with the nurse more. She’s so different around her.