Lakshmi is mainly seen in two forms- Sri devi and Bhu devi, but I read about another form of lakshmi
Nil devi
When Krishna took birth, he married
Rukmini – Sri devi
Satyabhama – Bhu devi
Radha was his love – Nil devi
It is Nil devi who keeps under control of his senses
I think, Sri devi and Bhu devi are physical forms of lakshmi whereas Nil devi is mental from of lakshmi who is internal energy of vishnu
Though it is my assumption
I think other 6 wives of Krishna are also 6 forms of lakshmi but sorry if I am wrong
Regarding 16100 wives of Krishna, they are the captives of narkasur whom Krishna married to restore their dignity and self respect
Regarding the gopis in vrindavan, I don’t know clearly but I am telling what I read in devdutt pattanaik book of Ram
Don’t know how true is that or maybe a folktale, in treta yug, when Ram was searching for Sita, the forest birds and other creatures asked to comfort him, he said, he is loyal to Sita so in next birth, they will born as gopis and enjoy his company in vrindavan as Krishna
https://en.m.wikipedia.org/wiki/Nila_Devi
Sorry, if I am wrong