Bojack and Diane are two characters who become close because they are very similar and they ‘get’ eachother, a personal understanding you don’t get with most people.
The first time they meet, Bojack gets her costume right away, despite it being so obscure and no one else understanding.
“I always tell people you’te like the not cool version of me”
I instinctively knew this show was for me when I shouted out “Baby Bjorn Borg!” the second Diane was shown in this outfit.