She is a creation of Lord Dream herself! She is to assist the lord on her duty to return living souls back to their body and send dead souls to Underground 2. She handles small and big hooligans on lord's sleeping time.
One time the lord was sleeping the lord's younger sister's dwarf planet crashed on one of the biggest sphere of the realm. This caused many dwellers of the realm to land on Earth. So she found Susan and Belzea to help her gather few troublesome dwellers who refuse to go back home and mess up society.
Lord says she's fine, but Krinket can't stop keeping her eyes on the cherub. She keeps catching her trying to make malicious contracts with humans and even dwellers on the realm, probably to take charge of everything. She knows that she did try in the past by making an army of Elves-weird pixielike creatures that stole the name of Elfs. She thinks that maybe the lord got estate fraud by this cherub when she first made the realm.
Her design changed. Previously her hands stuck out of her cape without arms as if she's a kirby character.(well she did take some influence of Susie) But I gave her obnoxious arms recently. I think that makes her more...formal??
She doesn't like Osi trying to take part in her job. (She later gives an angel food cake to Susan)