Considering the characters, this is the most appropriate choice. Yet I can't help but imagine Tenshi as the mediator and Iku as the one dancing (but with the disco pose). I don't know, maybe it is the hair.
Maybe. For what it's worth, I'd always thought of dancing as something Iku would do whenever she's free of work, while Tenshi'd be the sort to dance regardless of... well, whatever it is that celestials might consider work, I guess.