[@Zarkun][@Caits]
Ah, well the idea was she is like a newborn Spirit, Celestial or otherwise. That probably doesn't occur too often outside their own realm. So those that use spirits might have some sense that something unusual has occurred.

As for how to summon, I might actually leave that to the individual mage since Ariel isn't a specific kind of Spirit at the moment. If a Celestial mage tries it then a key will form for her. If it's some other way then whatever they use will form. Wing it.