Oh I love this, let’s go full fantasy villain mode.
Here’re my thoughts (and by no means do I believe them to be unbreakable, so feel free to poke, dig, discuss. This is all just good banter and fun):
Firstly, Mission Kill Stolas is an excellent point, glad you brought it up. Let me stretch it, for the fun of it.
Stella hires Stiker to shoot at Stolas during the festival in Wrath. Shoot AT. Just scare him a little, or even wound him, as a warning and as a message to always be on edge. To make him isolate himself. But, Blitz ruins that.
Blitz stops that and Stolas remains non-the-wiser. So she decides to try something else: Call Striker to come to a very public place, where she meets her brother and Stolas. If she really wanted Stolas dead right away, she could have let Striker into the mansion and kill Stolas in his sleep. Shoot him in that restaurant. Stop his horse anywhere, literally anywhere and put a bullet in Stolas’ head.
Why did Striker take Stolas all the way to Wrath, and allow him to CALL Blitz if the idea was to Just Kill Stolas? Why torture him if the idea was to have him killed and be over with it? Time. She needed time.
Because she needed her brother. She needed him to see this “clumsy maneuver”, to go “guiltyyyyy” all puppy-eyed so Andre can finally get in the game. And she must hate him for the freedom he has, for not being the one to have to merry well, for always talking down on her. So she does what she does best, embodies the stereotype Andre is sure she is, and lets him come to the conclusion of “We need Stolas alive”. As soon as that happens, Andre is hooked. Striker has no idea what is happening, but Stela doesn’t need him to know. She just needed him to stall, and inflict damage because, again, she is petty like that. But not kill him. Not yet. She would have called it off anyway, and nobody needed to know that.
The problem is, if they just acted soon after, it would have been suspicious. Sure, blame it on Blitz and his book, but what if Octavia got suspicious? What if Striker, out of fear, told everyone she hired him? So what does she do? Stella waits. She waits for the inevitable crashing of Stolas’ emotional state, because she, no matter how much we hate to admit it, knows her ex husband. She knows how little Stolas needs to be miserable.
And then it happens— the breakup. Of course she knows. At this point, her relationship with Octavia is maneuvered in such a way that she hears all about Stolas from her. She knows what happened, and she probably heard the “talk of the town” how Stolas went to Versika’s party.
Stolas is alone, desperate and miserable - perfect state for him to make a fatal mistake — and she goes to see her brother. Again. Slips it in so casually, “Ah yes, the book.” Again. Plants seeds and watches Andre burst into icy flames. But now Andre is all too excited, he is so convinced that THIS IS IT. So he acts, rashly. He “takes the reins” and flaunts in front of Satan, makes his bold statements, lies, acuses, makes a show.
And Stolas makes a mistake. He falls into a trap by rushing to save Blitz, he is not thinking about Octavia at all because it’s all very impulsive and fearful and — she has Octavia exactly where she wants her.
“I am so sorry, sweetheart…. Come here.”
Meanwhile, Striker already took the stand and lied, never mentioned her at all, Andre already became the public face of Stolas’ punishment. Stolas just risked his life for Blitz.
She’s a grieving, loving mother rushing to aid her child. She is victim of a scandalous relationship between her royal husband and an imp. She is a clumsy, pretty sister of a “mastermind”, a sister who can’t even remember what she had for breakfast let alone how to hire an imp assassin — how could she?
So as the chips fall and the dust clears, Stella hugs her daughter, away from everyone’s eyes, and smiles.