I started to notice close ups of the girls socks in the Heart Attack MV and have found a lot of interesting things. The video starts with Chuu (wearing white socks) following Yves (wearing black socks) 
Later in the video I noticed Chuu start to wear black socks as she was copying Yves
By the end of the video Chuu is wearing black socks
Next we have One and Only where Go Won is wearing black socks, but is also hiding and running from Yves and Chuu who also have black socks on.
Now I know they are just socks but the loonaverse can’t have this many specific shots of socks in yyxy videos for no reason. It all came together for me in Love4Eva
The Teacher (God) finds a dirty sock that belongs to Yves. Yves is seen being scolded by her after this, but Yves keeps going outside and eventually the other girls start to follow
As the video progresses we see that Olivia is the only one not disobeying while the other 3 let their white socks become dirty which I believe is a representation of them leaving Eden and touching the earth. Chuu follows in Yves “footsteps” but it takes Go Won a little longer
We see that Go Won is having a hard time leaving Olivia behind and her struggle seems to be accepting that she has rebelled. Which is why I think her socks are black in One and Only but she is still hiding. It isn’t until she accepts herself that her transformation happens
Go Won gets a crown and her socks are white again. I think she wanted forgiveness and Yves helped her see that she can still be pure and happy even after going against god and leaving Eden. I’m still curious as to how Go Won and Olivia reconcile and reconnect as well as Yves.
At the end of love4eva we see the 3 fallen girls sitting together and while I can’t see the other 2, Yves is wearing black socks now
And lastly I noticed at Loona studio the members socks during the Carol. All of the members are wearing black socks except for Yeojin. Does this mean she is still pure? Possibly still lost in Eden? Also some of the members have long socks and it i find it interesting who that is
Heejin Vivi Kim Lip and Yves are all shades of Red. They are also first girls of their unit (other than Vivi) and all wearing long socks. Also we know that Yyxy is one girl so naturally Chuu Go Won and Olivia also have long socks. The rest are wearing short socks and Yeojin white
