Maybe he already has a name - have you tried asking him?

[ Because at this point a talking unicorn wouldn't be out of the realm of possibility, Glint thinks. He drifts a little closer to Rosella and the unicorn, one ocular looking over the animal. ]

Otherwise, you must have something to call him. Crow named me, after all!

[ From further back, Crow calls: ] And you didn't like Sparky, which was my first choice.