noun, の adjective
The original model of something isn't usually very good. It's rough. It's a prototype.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
Oh, so this is the original prototype for the WaniKani doll.
This product has undergone many improvements since the initial prototype to become the form it is today.
We usually sculpt a model out of clay at first.