A/N: This is short, but I cannot stand that Lucifer didn't have a goodbye with Trixie (side rant: he could have left a voicemail or note if the show couldn't get Scarlett that long!) I don't accept she wasn't on his Goodbye list. So I had to fix it. Takes place before Lucifer leaves for Hell in the finale.

Rory was gone and the sooner Lucifer left, the better it would be on everyone, but he still had one more Goodbye to make. He couldn't have done it when he made his other Goodbyes because it was best at night. Chloe had gone into her bedroom to sleep off her exhaustion and sadness from the events that had unfolded with Rory. Lucifer snuck into Trixie's room and poked her in the head. "Are you awake?" he asked.

Trixie rubbed her eyes. "Not anymore."

Lucifer stared at the girl who wasn't his child, and yet, also was in some ways. "You have to come outside with me, Trixie."

Trixie shot up straight in her bed and stared at him. Calling her Trixie was startling. "What happened? Is my Mom okay?" she eyed up. "Did you do something?"

Lucifer sighed. "Your mother is sleeping, come with me." Trixie got out of bed and followed Lucifer into the courtyard and sat down. "I have to leave again, and not for a few months, forever," he blurted out.

Trixie was stunned. "No! You can't do this again! You can't do this to my Mom, or me, or Maze or anyone! I don't care about your family Devil business. You belong here."

Lucifer was caught off guard. "Devil business? You know?" That was going to make their final time together much easier to explain.

"I'm not stupid. Maze is my best friend," Trixie replied. "Why do you have to go?"

"You have to pretend to be surprised when your mother tells you, okay?" he asked. Trixie agreed. "Your Mom, well, she's going to have a baby. But I can't be here, it's a whole, sorted, destiny thing where I have to run Hell and help people as she grows up."

"You won't be here? She won't have a Dad? Your Dad may be God and he seemed nice, but he sucks if he's making you do this! Kids need Dads!"

"I agree, generally speaking," Lucifer said. "But it is what it is. And well, I'm going to need you to take care of them. And your sister can never know I left because I had to, she can't know where I am. The others… they'll help, but they'll need you the most."

Trixie fiddled with the drawstring on her pajama pants. "Yeah, I'll never leave my family."

The Devil pushed down a lump in his throat. "This isn't easy for me."

"Good."

"Dammit." He took a breath. "If it means anything at all, I won't be here, but you'll be with me. And you're with your Dad. You know I'm the Devil, well, he's in Heaven and it's entirely because of you."

Trixie's mind was racing too fast to even ask what that meant. "But I won't have either of you."

"Not now. Many years from now, Amenadiel will work it where you can come see us both as you please. But not until you live out your life. And if there is anyone who will make the most out of a human life, it'll be you."

"It won't be the same without you around."

Lucifer smoothed out his suit jacket. "So how about one final hoorah? Your Mom will kill me if she finds out, whether you splatter to the ground or not. I should have done this sooner, but I wasn't sure how to break the Devil thing to you." Lucifer spread out his wings and held out his arms. Trixie was momentarily awed. "I can't take you to Mars, but we can go pretty far into space. Hop on. Do. Not. Let. Go."

Trixie was mad, but she couldn't resist flinging herself into Lucifer's arms and up they went. First they flew around Los Angeles slow enough to take in the view, but when that was over, neither Trixie or Lucifer were ready for it to end. It took a few minutes soaring through the stars, looking down on everything, to get to New York City and then he slowed down and he told her about fun things to do if she ever went there, and she should insist on having Amenadiel fly her there at Christmas. On the way back they hit a few other major cities, all came with stories of Lucifer's adventures there. Trixie would add which ones she would like to see from the ground one day.

When they returned to Los Angeles, and Chloe's house, they snuck back in quietly and went back to Trixie's room. "That was amazing. But that's it, isn't it? You're leaving?" she asked.

"I have to. The longer I stay, the more I won't want to. I already don't want to."

Predictably, Trixie launched herself into a hug on Lucifer, but this time, the Devil returned it. "You would have made a good Dad," Trixie whispered. "The second best. But this baby would think you're the best."

"I have you to blame for that, don't I?" he replied, ignoring her understandably biased assertion Dan was better, trying to hold his usual bravado. "As far as small humans go, you were the first evidence I had some of you can be fine."

"I love you," Trixie said.

Lucifer, who never lies, had to be honest for their last time on Earth. "Yes, well, as much as I resisted, you forced my hand into loving you, too." He cleared his throat. "And you're going to make a great Astronaut. Even with your hooker's name, they'll take you seriously," he had to break the tension somehow. He pulled out a wad of hundreds. "A final payment, and Maze has more to give you as compensation since you're going to be helping your Mom and sister a lot. The least I can do is take care of you this way. The price of university is steep I hear and you cannot drive the kind of cars your mother does."

Trixie put the money away. "I'll fill you in on everything when we see each other again, too."

Lucifer was hoping he'd be able to see what they were all up to, but he wasn't sure how that was going to work. "Well, of course that's going to happen. It's the origin of our transactions. I also need to commission something." He went out to the living room and he swiped one of Trixie's drawings of him as the Devil (it hit him that he was oblivious to her expressing she took him seriously all along), along with her and Chloe and returned to her room. "I need you to update this one with a baby," he paused and thought about Rory's pink hair, "definitely in pink."

Trixie got to work quickly adding in a small person and handed it back to him. Trixie slowly got back into bed. "Goodbye, Lucifer."

"See ya later, Urchin," he said with a wink, before leaving with the artwork that will go in the office he was planning on creating.

A/N: That's it. I hope it was a satisfying read even though it was short and I only planned it yesterday.