Why not consider "Hilda" , who is ERis's mother , and elinalise sylphyde's grandmother (if I remember correctly , in the novel ERis's mother dies because of the catastrophe ) .
Will Mc be changing his name in the future? For some reason the name Rudeus doesn't match Mc, it was also mentioned in the previous chapter that Paul would make Rudeus the baby die, so Mc needed a new name.