Remember when you told me Jeremy Jordan voices both Varian from Tangled and Lucifer from Hazbin Hotel?
Well I checked Varian’s songs or more specifically “Let Me Make You Proud.”
The song made me imagine Lucifer attempting to reconcile again with Etienne. This time is much better and with much more sincerity and conviction because he was given counsel by Husk and Cherri who have better IQ and EQ and life experience than Charlie.
He asks Etienne to believe in him one more time. For one more chance. That yes she’s right to have doubts in him and he has made mistakes and disappointed her but to believe in him this one time and she’ll be surprised. He’ll save the day(or their family) and make her proud of him.
I imagine it as an uplifting scene full of hope for Lucifer that even manages to move Etienne’s heart. Enough for her to hesitate and hope again.
(An alternative is in a much later part of the story. Lucifer singing this song to Charlie, swearing to not let her down and that he’ll get Etienne back from Roo.)
I also imagined that after Roo senses Etienne’s hesitation. They come over and do that Meg and Hades scene from Hercules or that Rapunzel and Mother Gothel one. The one where Hades/Gothel is trying to convince Meg/Rapunzel that their judgement is wrong and Hercules/Eugene are men. Not to be trusted and not different.
Additionally, there is also a short reprise of “I Will Make You Proud” where it’s more sad and angry.
Maybe Lucifer unintentionally messes up again or says something insensitive that Etienne overhears and breaks Etienne’s heart again.
Etienne remember Roo’s words and locks herself in her room. Roo shows up and embraces her as Etienne quietly sings the lyrics. That she’ll make Roo and Alastor proud. That no matter what becomes of her she’ll succeed and whoever stands in her way will pay.
Lucifer singing about making someone proud of him seems extremely fitting to me. Lucifer is pride itself; it's practically obligatory for him not only to feel it himself but also to make others feel that way about him.
I can see it, I imagine a scene that is a mix between "More than anything" and his part of "Vox Populi", where Lucifer, full of genuine feeling, sings to Eti, but with the same energy as when he faces Vox, with the conviction that this time everything will be different and he will triumph.
Of course, Lucifer wants to do things right, to show that, despite everything that has happened before, everything can be fixed [Maybe I make things a mess. And maybe you're right to have doubts in me. Maybe, but nevertheless. If you for once could just trust me. Just this once let me come through for you. The way that you want me to. Let me make you proud. Let me show you the best in me. Let me give you a reason to believe that I can stand tall. And when I return. And I'm more than you dreamt I'd be]. Of course, Lucifer made a mistake and wants to make things right. He knows he messed up, but he wants Eti to trust him, to show her that what he showed her before isn't all that he is, that he's much deeper, that what she saw of him is only a part, not a complete picture, a mere projection, and that, in reality, she doesn't know him. He acknowledges that this is his fault, but they can start over [Maybe then you will realize. That you never actually knew me at all. Sure, I've made lots of mistakes. I know that I've disappointed you. Still, though, whatever it takes. I'm gonna fix it, just watch me. Just you wait, I'll make it up to you. If it's the last thing I ever do. I will make you proud. I will make you have faith in me. I will prove that the way I used to be is all in the past. I will save the day. And come back here triumphantly. 'Cause I long for that look of surprise. When you see your son (dad) rising at last. The pride in your eyes. When you see your son (dad) rising at last]
Lucifer wants Eti to see him as her father and to be proud of him, that she feels proud to be his daughter, to feel safe and that she can trust him, that she can turn to him, and that they can put all this "misunderstanding" behind them and move forward as a family.
I think Eti would be moved enough to have some doubts. She's a child longing for a loving family, and here Lucifer is finally opening that door. She's hearing a genuine apology and a real desire to make things right. Yes, Lucifer is a jerk to sinners, and he treated her that way because he thought she was a sinner. Nothing justifies him being a jerk, but if he's willing to apologize to her, perhaps he's willing to change.
And of course, as is often the case with the proud, they tend to fall.
Roo cannot accept that doubt, that hesitation, that hope. Etienne must not lose sight of her plans, she must not stray from the path Roo has laid out for her.
I remember that scene in "Tangled" where Gothel patiently waits with the bandits for a chance to show Rapunzel why she should stay with her. The first thing she did was plant seeds of doubt in Rapunzel's mind to make manipulation easier, and then create a scene that confirmed those suspicions.
I also recall the case of Frollo with Quasimodo in "The Hunchback of Notre Dame". Frollo killed Quasimodo's mother at the gates of Notre Dame, and even tried to kill him for being "deformed", but he was stopped by the archdeacon. As penance for killing a mother who only wanted to protect her son, Frollo had to raise Quasimodo as his own, but because of his deformity, he raised him locked in the bell tower of Notre Dame. Frollo told Quasimodo that his mother, a gypsy, abandoned him and that he mercifully decided to raise him, and for 20 years he instilled in Quasimodo a fear of gypsies and the outside world. Just when Quasimodo thinks he'll finally have a single day off, all his fears, all of Frollo's manipulation, are confirmed. The townspeople, who were initially kind, only need one to start humiliating Quasimodo to join in and essentially torture him until the gypsy Esmeralda saves him. He vows never to go out again because Frollo was right: the world is dark and cruel.
Something I think Roo would resort to is emphasizing two things regarding Lucifer:
The differences between how he treats Charlie and how he treats Etienne.
Lucifer has shown that he doesn't care about anyone's opinion, except Charlie's. Charlie is his beloved daughter, the one he had with Lilith, the love of his life, his wife, his queen. Charlie's existence was so desired that they resorted to a surrogate to have her, and throughout the second season, Lucifer demonstrates that he only cares about Charlie's opinion. Even when Vox humiliated him, he didn't care, because he is pride incarnate and doesn't care at all what sinners think of him until he thinks about how Charlie will react (not how she will be affected, only how she will react).
In contrast, Roo would emphasize how Etienne was an "accident". She wasn't expected, planned, or desired. She couldn't even be considered the result of a "one-night stand", just the consequence of a drunken night, something easily forgotten the next day. The only one who anticipated her existence was Alastor, and he suffered the consequences of that decision. And Lucifer only began to care about Etienne when he learned she was his daughter. If he hadn't known, he would have continued to dismiss Etienne as insignificant.
Obviously Eti would be hurt, but hope was rekindled and she can't just extinguish it...and that's when Lucifer ruins it (by accident).
I see many ways that could happen. Perhaps, as you mention, Lucifer uses the same song with Charlie, and Etienne thinks that everything he said to her before was only for Charlie's sake, not for her. Perhaps Etienne thinks Lucifer is only doing it out of pride, to feel good about himself, to avoid feeling like he lost, perhaps to avoid feeling like he's a failure as a father. Perhaps Lucifer talks to Charlie about his experience as a father and what she was like as a child and says something that could be interpreted as "Children are easy to deceive" (which wasn't what he meant).
I can imagine a scene where Eti eavesdrops on Lucifer and is once again disappointed by him. If it were an animation, I imagine the melody of "Takedown" playing as Eti walks away (specifically, the melody of that part of the song that says "Oh, you're the master of illusion, you won't fool me this time. Look at all the masses that you're foolin'. But they'll turn on you soon, so how. How can you sleep or live with yourself? A broken soul trapped in the nastiest shell. I will not hesitate, I will fulfill my duty, and watch you die-ie-ie") as Eti gets angry with herself for "letting the master of illusions deceive her".
I can see Etienne walking away, perhaps going back to Roo, telling her how she's always been right, thinking that, even though Roo can be strict or cruel at times, at least "she's never lied to her" [I will make you proud. Get the answers and set you free. Don't you worry, whatever it might take, I'm finding a way. And I swear right now. That no matter what comes of me. Anybody who stands or has stood in my path, they are going to pay. They... will... pay]