I already have an idea how she did it. It's incredibly simple, but hard to explain, it's more like she knew how to please them as well as how to bring them into a sweet dream and away from reality.
They all must have had problems and responsibilities that made them feel suffocated or pressured, which I suspect is the case since living in such a society where jealousy and greed is a normal thing, she must have given them a reassurance with her innocence and 'cuteness'.
And that must have been the think she used to her advantage, we all know she's bad news, thankfully albert finally realized this and was able to get out the trance she put him in.
She pleases her victims and enemies and puts up a façade of being a innocent oblivious child to fool those around her.
As evil as she is I have to give her props for fooling many .
Basically she's a wolf in sheep clothings.
She used there weaknesses against them.
I forgot to say that the chances of it being mind control or any supernatural or magical cause is very low.
This chapter was interesting, because it raised some questions as to how Yuri was able to so easily influence those four guys.
Mimosa outright says that before here they acted befitting of their status -- and yet after meeting her they became lovestruck idiots. Despite acting like a child 90% of the time. The manga lists this as a fantasy, so perhaps magic is the reason? Maybe she's drugging their food/drinks? Some sort of pheromone effect perhaps?