>>49808868
as for the wni casters, they all should speak standard japanese since it's a national stream, but sometimes (not very often) they let their local accent to show up during their (nowadays scarce) "free talks" segments

sayachi with ibaraki accent, yui and senchan with tohoku accent, richan and michan with kansai-ben, yuki also spoke a bit with hakata accent, etc., but you must have at least an N3 level to catch a bit

other casters rarely did it (i havent listened to sayane or ayame speaking in hokkaido-ben)

they even did an entire "ibaraki accent" day some years ago https://www.youtube.com/watch?v=gyTDnKhn2xg