Bluekitten is just the 100th or so reincarnation of recoiledsnake, which is as far as we can tell a Microsoft astroturfing campaign. Lately their sockpuppets are often female, to give people the impression we're banning women when we ban them.

Are there many accounts like that on HN?

This person or group has created lots of accounts, but there are no others like them that we know of.