[FairyKing]

It's been a while since I watched OOO and I forget the titles of the original combos, so apologies if some of these are repeats:

SaRaMiuo - Deep-sea Combo
BiKaSo - Clawed Combo
ShiGazeShi - Grassland Combo
MukaChiRi - Swarming Combo
SeiShiroGin - Blizzard Combo

I also don't remember what types of desire the original sets were based on, all I recall is that their Greeed counterparts created different types of Yummies:
Ankh - Yummies keep their host in a secure location while bringing them things they desire (like a mother bird bringing food for her chicks)
Kazari - Yummies merge with their hosts like parasites and use their body to pursue their desire (not sure how this relates to cats)
Uva - Yummies start off as the basic form before molting into a complete form, and consume what their host desires (like how insects metamorphosize)
Mezool - Yummies nest and then hatch in swarms to violently help their host achieve their desire (like fish spawning in large numbers)
Gamel - Yummies are created already complete from Gamel's own desires (again, not sure how this relates to large animals)
Dr. Maki - Yummies have objects for hosts instead of people, and destroy desire instead of feeding off it (because the purple medals are the absence of desire)

So based on that, here's how I imagine the Yummies created by these new Greeed would behave:

Deep-sea Greeed - all Yummies created by this Greeed are giant monsters instead of human-sized, they try to destroy any obstacles between their host and their desire with overwhelming force (based on how big whales are)

Clawed Greeed - these Yummies make hidden burrows in a location related to their host or their desire and claim that place as theirs, emerging to attack anyone they judge to be an intruder (based on how crabs and scorpions bury themselves to hide)

Grassland Greeed - these Yummies are able to mimic the appearance of their hosts, and will spend most of their time impersonating their host and pursuing their desires that way, only revealing their monstrous true form when they need its power (based on how herd animals use large numbers to confuse predators)

Swarming Greeed - these Yummies gather materials to build a hive or nest for their host based on their desire, and if the host doesn't stay there willingly, the Yummy will keep them there by force (based on bees and ants building hives and anthills)

Blizzard Greed - these Yummies put their host into a deep sleep, during which the host experiences vivid dreams of their desire while the Yummy fights to prevent anyone from waking them up (based on arctic animals hibernating through the winter)