Grendels, ettins and shee will appear as norns, because there was no genetic code to determine species sprite in Creatures (as there is in Creatures 2) and this was determined by the creature's genus. Since norn is the first entry available for this new attribute, this is assigned to all converted creatures. For some odd reason, the Nornverter wasn't included with Creatures - The Albian Years. It can be downloaded, however, on this page, at Don's website AmberCreatures.