Still we can't be 100% sure as it hasn't been said, Evergreen never confirmed the identity, so unless Savin or whoever created Senja confirms it.I mean look at her standing pose, its quite literally Gwyns, to make the hint obvious(also there seeming attraction to you like the borc and gwyn).
Pretty sure thats the price to pay for not have a defacto soul, they need something to help keep there form stable.
Still some people can say that is slightly evil/wrong/bad/whatever to a point.. if we refuse the roaming Kitsune outside their den, they fight us.. they can't and won't take no for an answer unless we are either with Kiyoko or champ is a Kitsune herself.
Everyone is capable of evil and unfortunately for the Kitsune, they have no futa ladies for my champ at the moment. So Evergreen, being a dom and a futa, has my vote.