Hello! This is ironic because one of the bands I listen to when writing is Skald, which is a French Nordic band. Their music very much has a viking-esque feeling to it! Another band I listen to often when writing is Faun, which is a German band that has a folk/pagan/medieval vibe going on. All of the above are what I picture for the Iredicci, but feel free to headcannon whatever you like best!