[ Ruby ]
actually, yes! our system has always been almost entirely nonhuman and we typically consider ourselves to be more nonhuman than human, so we identify as otherkin. We aren't exactly polykin though, and we're mostly kin on individual levels (like I'm a nuckelavee in the system and consider myself nuckelaveekin, but no one else in the system is a nuckelavee). I think we may have a few mlpkin? but I'm the only equine who fronts afaik.
a lot of us are also otherlinkers (where we choose nonhuman/fictional identities) and otherhearted (where we feel strongly connected to/identify with something nonhuman/fictional), but I personally am not either of those! though checking in with the people in co-front apparently we have a huge alterhuman connection to changelings without it being kin, we definitely identify with them and a few of us voluntarily identify as our sona, not to mention our daemon's been taking a changeling for for the past few weeks!
we could also explain the concept to anyone curious, alterhuman stuff in general is a big interest of ours (we've written essays on it + participated in studies)!