Taken from here:
https://archive.nyafuu.org/vp/thread/32508860/#32510297While the first stage elemental monkeys are cute, almost identical children, their evolutions represent them growing up into different negative stereotypes from Japan.
Simisage is either a bancho or a yankii, Simisear is a biker, and Simipour is a Kogal.
The "three wise monkeys" theme could also apply here somehow. Simipur for example could be blind to stop itself from buying everything it sees, being a materialistic kogal.