Zera is the horse Hance generally has in the Were Realm reality if it's an older time. She's a fiesty well built mare who is perfect for the common snowy living conditions and has a wonderful habit of biting anyone she doesn't like. She is incredibly picky about her rider and will point blank refuse to let alone bar a very select few do it.
In some she has some dragon blood as well in purely a why the hell not factor. When she does it's not just Hance or Rayen that can understand her and it turns out she can actually be fairly snarky.