[quote=@rush99999]
Why isn't Nightingale immune?...Wait...Oh...Actually I think I already know.
[/quote]
There was a clue to that at the beginning of the previous engagement:

[quote=@Genni]
[b]Bumblebee[/b] is immune to [i]Beguiling Tune[/i]: Female Heterosexual
[b]Nightingale[/b] is now [i][b]Smitten[/b][/i] with [b]Gungirl 1[/b]! 
[/quote]
An open sexuality can be a dangerous thing when mind-warping sirens are on the loose.

That, or Nightingale's really a man in drag. :lol