Abigail has lines with a number of yours, but I am definitely open to more! I need to push her more at Hannah since she likes the Puffs. If you want Susan to have someone to talk to about her feelings for Seamus, I can volunteer Abigail for that.
She is related to Morag through Morag's mum being a Fawley, so she should probably interact more with Altair.
For Lucius - her family owns a law firm and may have represented him at various points?