Lestat and his constant protectiveness/worry over Louis in the books

I saw Gabrielle break through the side door before the car hit the ground. And she and I were both rolling over on the grassy slope as the car capsized and exploded with a deafening roar.“

Louis!” I shouted. I scrambled towards the blaze. I would have gone right into it after him: But the glass of the back portal splintered as he came through it. He hit the embankment just as I reached him. And with my cape I beat at his smoking garments, Gabrielle ripping off her jacket to do the same. - The Vampire Lestat

What was she doing? Assessing their power? Looking from one to the other, and then back to me. A stranger looking down from some lofty height. And so now the fire comes, Lestat. Don’t dare to look at Gabrielle or Louis, lest she turn it that way. Die first, like a coward, and then you don’t have to see them die. - The Queen of the Damned

“Ah, Louis, forgive me.” The dark neglected hallway. I shuddered. “I came here because I was so concerned . . . about you.”

“No need,” he said considerately. “It was just a little pilgrimage I had to make.”

I touched his face with my fingers; so warm from the kill.

“She’s not here, Louis,” I said. “It was something Jesse imagined.”

“Yes, so it seems,” he said.

“We live forever; but they don’t come back.” - The Queen of the Damned

“All right,” he said despairingly. “I hope you discover the man’s seduced you with a pack of lies, that all he wants is the Dark Blood, and that you send him straight to hell. Once more, let me warn you, if I see him, if he threatens me, I shall kill him. I haven’t your strength. I depend upon my anonymity, that my little memoir, as you always call it, was so very far removed from the world of this century that no one took it as fact.”

“I won’t let him harm you, Louis,” I said. I turned and threw an evil glance at him. “I would never ever have let anyone harm you.”

And with this I left.

Of course, this was an accusation, and he felt the keen edge of it, I’d seen that to my satisfaction, before I turned again and went out. - The Tale of the Body Thief

Oh, yes, I had asked for it, as mortals so often declare. And I had done this despicable thing of letting loose the Body Thief with my powers. True. Guilty again of spectacular blunders and experiments. But had I ever dreamed of what it would truly mean to be stripped utterly of my powers and on the outside looking in? The others knew; they must know. And they had let Marius come to render the judgment, to let me know that for what I had done, I was cast out!

But Louis, my beautiful Louis, how could he have spurned me! I would have defied heaven to help Louis! I had so counted upon Louis, I had so counted upon waking this night with the old blood running powerful and true in my veins. - The Tale of the Body Thief

I thought then of Louis’s rejection, and that I would very soon see him again, and an evil satisfaction rilled me. Ah, he would be so very surprised. Then a little fear came over me. How would I forgive him? How would I keep my precious temper from exploding like a great wanton flame? - The Tale of the Body Thief

No scent of a mortal signaled an intruder. In fact, I knew the step that was approaching. I had heard it so many times in my life both mortal and preternatural. Yet I didn’t dare to believe in such a rescue from my misery, until the unheralded figure appeared in the courtyard, his velvet coat dusty, his yellow hair tangled, his violet eyes looking at once to the grim and appalling visage of Louis:

It was Lestat.

With an awkward step, as though his body, so long unused, revolted against him, he made his way closer to Merrick, who turned her tearstained face to him as if she too were seeing a Savior come in answer to her directionless prayers. - Merrick

Lestat seemed to be considering these things. How could he not? Once, he himself had gone into the sunlight in a distant desert place, and, having been burnt again and again, without release, he came back. His skin was still golden from this hurtful and terrible disaster. He would carry that imprint of the sun’s power for many years to come.

Straightaway, he stepped in front of Merrick, and as both of us watched, he knelt down beside the coffin, and he moved very close to the figure, and then he drew back. With his fingers, quite as delicately as she had done it, he touched the blackened hands, and he left no mark. Slowly, lightly, he touched the forehead, and once more, he left no mark.

He drew back, kneeling up, and, lifting his right hand to his mouth, he gashed his wrist with his own teeth before either Merrick or I knew what he meant to do.

At once a thick stream of blood poured down onto the perfectly molded face of the figure in the coffin, and as the vein sought to heal itself, again Lestat gashed it and let the blood flow. - Merrick

“Come now, enough of these ‘things,’ ” he said with a tone of remarkable weariness. “New Orleans waits. Louis waits. And if he hasn’t come down to New Orleans as you asked, I say we go to New York and get him.”

He had mentioned Louis countless times in the last six months, but the strange thing was, I didn’t trust him with all these mentions of how I needed Louis, and ought to write to Louis, and ought to pick up one of the many telephones around me and call Louis. I had some deep fear that he was in fact jealous of Louis, but I was ashamed of that feeling. Now he was saying, Let’s go, let’s find Louis.

[…]

This troubled me, and I wasn’t sure quite why. What if he suddenly wanted to hurt Louis? What if he became jealous of Louis—of my affection for Louis?

“Nonsense, go to him,” he said. Calm voice. Manly voice. “Am I jealous of your son, Viktor? Am I jealous of your beloved daughter, Rose? You need Louis and you know it, and he’s ready now to surrender. - Prince Lestat and the Realms of Atlantis

And so it was done. Louis was putting on his jacket and scarf. I was unhappy. I watched him pulling on his gloves. I couldn’t imagine how this could end productively or happily. I didn’t want Louis to be humiliated, but what could Fareed and Seth say to talk of the silver cord? If they became impatient and short with him, I’d be furious. - Prince Lestat and the Realms of Atlantis

I knew that the monster had other resources. We all do, the clever ones, who don’t wish to move through eternity like tramps. He had gold and jewels in hiding places. He had wealth undreamt of and unrecorded. And dwellings perhaps of which no one knew.

And now he had taken my Louis, my helpless Louis. Penetrated our most fortified refuge, and taken Louis away.

[…]

Again, I was not thinking. I was merely knowing—and knowing that Louis, Louis the most vulnerable of us all, was in the grip of that monster—or already dead. - Blood Communion

“In all these centuries,” said Cyril, “never have we known one whom we could see as our champion. You can’t really know, boss, just what you are now to the others. You think you know, but you don’t, and that’s why I’ll be right outside your door again sleeping in the passage, sleeping here so nothing and no one can get at you or hurt you—as long as I live and breathe.”

Then I was alone in the chilling darkness—with the villain Armand despised, and the son who had not protected his mother, and the lover who had never protected Louis from himself or others, and the miserable pupil of Marius who had so misjudged Rhoshamandes that now Marius was dead. - Blood Communion