Who is Missi from The Long Hard Road Out of Hell and what is their importance?

Manson had a bad experience with a girl named Nancy, who was part of Manson's act. After firing Nancy, Manson decided that he liked the idea of having a girl featured in his "performance art," so he replaced her with a much more pleasant and attractive girl named Missi.

Missi would do most anything on stage, although she didn't allow him to use her like Nancy did. She once appeared nude in a cage full of live chickens, and she went along with most of Manson bizzare senarios.

Over time, Manson developed a strong emotional attachment to Missi, and they became a couple. His cocaine abuse and nihilistic, depraved behavior, however, would eventually cause her to leave him. Manson never completely got over Missi.