Ok did not expect the sister to be the girl on the cover.
Plus she has been sick all this time, time for Luna to use judgement and check on what skills the younger sister has.
Rude seems to be more of a harem hero than the previous hero indeed.
What I really do not understand is how he uses the same tropes and I get sucked in each time. Although this time I really do not want any of these characters to die though.