Kai first thought of ruggie was a coward that he had magic yet he stole their pens and run
First She didn’t believe in strategy she believed that fighting and facing the problem face to face are the best (ironically she wasn’t like this in the real world) before developing a friendship with him
Night strolls (both sleep deprived) venting about their shitty lives
Kai discovered an alternative way to do magic (reference to toh) though her favorite spell is a sword (which she was embarrassingly bad at it)
So she (around chapter 4) asks for silver help (she wanted tsunatoro help but she didn’t find him and bumped into silver practicing which she loved)
With that ruggie got suspected acting like the fake boyfriend he is (and to tease Leona) but fr ruggie feel betrayed by the lack of time she give her other friends