I would consider it to in most cases but not all. One of our others is vampiric but as a result of an internal accident more than anything else.

I would say though that one member of a system can be otherkin, or a certain kin-type, and the system as a whole would not be. At least that is how it is for us. I would consider myself something other than human and several of the others would in different ways as well, but many of the others are just plain human, so the system as a whole is a mix. I suppose one could have a system whose members are all "other", just as there are systems that are all human although I've never met one.