She knows @_@ Rena is a very smart girl... her POV and monologues are honestly refreshing compared to the Rworded MC and even Shion was not that good... but Rena here is super interesting @_@ Rena is smart... she knows Rina is probably using her father to take as much money from him as possible... i think this is going to be the reason she kill her @_@ but there is also the chance Rina is actually interested in being with the dad... why would she make him by new furniture and live with him there instead of just making him spend that money on her instead?.... on the longer run, it would be better for her @_@ so maybe Rena will misunderstand her? or something like that @_@