Kiryurules
It's so easy when you're evil
Uva→Ubau (奪う) To take/snatch away something. Uva's Yummies takes something hosts values.
Kazari→Kazari (飾り) To decorate. Kazari's Yummies are "decorated" onto the hosts and then grows through them.
Mezuru→Mederu (愛でる) To love. Her Yummies grows out of love? The girl loved shopping and caused a bunch of piranha Yummies to grow.
Gameru→Gameru (がめる) Trying to win big in a gamble. Still haven't seen his Yummies, so I don't know.
Ankh→Aku (悪) Evil/Darkness. They are created through darkness? I have no clue at all.
These are just guesses, though they kind of work.
That's actually really interesting. Also, I think the next episode has the word "Jackpot" in it, so maybe that has something to do with Gameru's Yummy?
Edit: Episode title is "A Bad Landlord, a Trap, and a Jackpot"