I decided to recognize this strange arrangement in a semi-formal sense, with the fanciful explanation that after being brought back to life Chara Dreemurr was now in need of a job, so I decided to hire them as my "ambassador to the humans", i.e. the human voice for the dragon and the horse. I had some ulterior motive in that I wanted to be a bit freer with blunt talk (i.e. in political "discussions") than I felt I could be with Kel or even with Mono, and Chara could be my "attack human" if I wanted. I promised that I'd repay Chara with #Undertale fanfic telling their story--a promise I've yet to make good on :/