First we got a ChrysalisxLuna kid. Her name is Nymph and like her Changeling mother, she feeds off love. With her appearance, many find it difficult to love her, which keeps her alone frequently. However, since she's alone, she doesn't need to do much in terms of finding enough sustenance. Also similarly to Chrysalis, she can shapeshift, but her eyes will remain the same, no matter what form she takes.
Second is Obscurity, the DiscordxLuna kid. Obscurity takes after her father in her love for mischief. Specifically, she loves messing with perception. When it comes to her form of chaos, she'll pick a specific target and, in a way, haunt them. They'll see things differently, other ponies differently, and, solely to them, the world will seem to turn upside-down. Until Obscurity gets bored, at least.
Lastly is my StarlightGlimmerxLuna kid. I really want it to be that Luna defends her, that Starlight was looking for the best interests of the many, with ill means, and she can be good and she can be an asset to the kingdom. Luna sees to it that she takes responsibility for her and they fall in love and make this darling. Seeking to be the redemption of both her mothers, Illuminate does whatever she can to bring good and light everywhere she goes.