Hi soo I found more things yay
First are the rivals there are three and they represent the rest of I☆RIS
The Red and Blue are twins and are sailors properly a Feminine,Ethnic Brand The Purple is the leader and she reminders me of Aoi from Aikatsu as fluttering girl, she might be friends with Sophie or somethingNow Cosmo
Since Cosmo has blue hair she did get that from the other parent since Sophie has pink or she dyed it
The Dance is last on a show (not puripara) I☆RIS did a dance with all the characters including the rivals!