
Well actually the question was whether this was polyamory (not polygamy).
Polyamory is the act of having intimate relationships with more than one person at the same time. U could say the anima like mintz and chika have polyamorous relations but the animus do not.
Polygamy involves being married to multiple partners so yeah this would be polygamy for all three people.

https://www.google.ca/imgres?imgurl= https%3A%2F%2Fmiro.medium.com%2Fmax%2F1223%2F0*sXcMI15cshI1adf3.jpg&imgrefurl= https%3A%2F%2Fmedium.com%2Fpolyamory-today%2Fwhat-is-polyamory-34ec722bff66&tbnid=aIJSFKDbpN0_kM&vet=1&docid=9EofqhDmDbz3uM&w=466&h=512&hl=en-ca&source=sh%2Fx%2Fim
Is this polyamory