Probably Rachel By the Bay: https://rachelbythebay.com/w/2020/03/04/annoyed/

Hi?

hiya rachel. you good?

Blogger commonly linked to on HN, domain name is rachelbythebay.com

I guessed that is who it was but I you know she is not exactly 'PG'. And her name isn't unique enough like 'Elon'.

I read comments on another blog whereby one commenter thinks he is a guy who can use his girlfriend's name as if everyone should know that is who he is talking about like he is on a first name basis with the crowd.

Well, if you figured it out then maybe Rachel is unique enough =)