i think they did fine on ephriams character, minus the cheesy sibling bond they keep bringing up every second line. works for seliph and julia, but ephriam and eirika were less verbal about it iirc.
i loved the line debunking the incest. the way ephriam delivered it was the least subtle callout ive ever seen.
on another note, does anyone else find eirika going on about how she isnt as strong as her brother cringy?