Might be just me. But I am worried that he might snap and start killing all the people she chooses him to marry or creates an "accident" that causes their downfall.
@Rat83 i think she is suspicious about something, definitely
she noticed the physical contact has a meaning but i dont think she really understands what he means with that, i mean not only she never experienced love or positive emotions/feelings at all she also lived hundred years being forced to kill people as a sword...
this is basically going to be the romance of two people full of traumas, being them a girl that doesnt understand or feels emotion at all and a probably emotional unstable boy