I'll mark this spoiler just in case, but Rei establishes later that she doesn't want to change too much because she risks losing her knowledge of what's coming if she makes too many drastic changes. This is also just a personal theory based on later parts in the series and the two books after this first series, but I also think Rei might be a bit of a sociopath. Like, she has empathy and people she cares about deeply, but would ultimately throw anyone under the bus if it meant protecting Claire. The real Rei is a lot more cunning and cutthroat than the goofy persona she's adopted so far would suggest.
I'm really excited that we're getting so close to the second half of the first story! For those of you who've only read the manga so far and not the novel, that's when the story really takes off and becomes next level stuff ^w^
FR, There is this one scene from the LN.... I don't know if they already adapted that into the manga or they just skip it. No major plot happens but that one time, (I don't quite remember) The scene that involving a child(I forgot) and Rei's not giving a sh¡t about the child but Claire does... I was SHOCKED to see that reaction.
