Where are those popular demons of legend, the Incubi and Succubi?
You can make servants of Andrealphus or Beleth’s odder minions serve this role (or some of the Lilim, of course). At the moment, there are no plans for these to appear in the game as distinct Bands. Even if they did, they’d be minor ones. So, basically, “succubus” is a job description, not a Band.
