(My English is not very good, forgive me if I said something wrong)
I started thinking about this a lot recently, this thought came mainly from Vaggie. The way she expresses herself gives me an image that she sees herself as a weapon to be used by someone, she was created to be an exorcist angel, that is, to protect paradise and follow Adam's orders.
But we all know how that ended, and then she met Charlie. And guess what she did? She protected Charlie and followed what she believed in(but this time in a good way),a great parallel we have about this is between her and Carmilla, Carmilla creates weapons to be able to defend herself and protect her family and Vaggie uses herself as a weapon to be able to protect and maybe be used by Charlie(But of course Charlie would never use or see her like this)
Another example is Lute, who was created just to be another exorcist angel and to kill sinners, she follows this thought as her philosophy because she was created for to do this.
We can even put this in Lucifer, who shows obvious signs of depression after his fall, and I believe this came from the fact that they took away from him the only thing he did while he was an angel: Create.
Maybe the reason he loves ducks so much is because he created them, and now that heaven has forbidden him from doing the only thing he was made for, he is now just repeating his creation over and over again as a way to try to "continue" doing the job he was assigned.
Each angel was created only to be able to do a job and so they take that as a reason to live.
(But this is just my theory👍)
"I tried so many years to make it comfortable for us; to have this family, but it was never enough. The only reason I have endured your constant insults and cruelty was for that girl to have a normal life." - Stolas S2 E1
"Also, son, you are destined to sire a precautionary addition to the Goetia family." - Paimon S2 E1
Some of you all are completely misunderstanding the second half, I am not downplaying the love Stolas has for Octavia, I am not saying that at all, what I am saying, is that Octavia is 100% going to think she was a 'obligation' when she finds out she was born to be a 'precautionary addition to the Goetia family'.
"Stolas isn't wrong for choosing his own happiness for once after years of abuse and depression"
and
"Octavia isn't wrong for feeling betrayed by her father and fearing she's been only an obligation to him"
are two concepts that can and should coexist.