Freyja

Freyja is a "child", or soul, that you can summon to fight your way through the world of Destiny Child.

Profile
Mona named this Child after Freyja, the goddess of love, for one simple reason: her pact was made for love.

Since Freyja comes from a cat, she still sometimes mews at the ends of her sentences, and has even been known to call Mona "Meowna".

At times, she wanders off unannounced, but we now know that's only because she's off visiting her pactmeowker. Er, pactmaker.

Children
It should be noted that in this case, the use of "child" does not mean the character is a child. Like all the other summons in this game, "child" simply refers to the soul that is being summoned.