"Did you feel that?" T'nar asked. The Father nodded, he had felt it too. "Looks like Littlefoot just tried to get back", he said, then smiled, "He's probably going to have some choice words for us once we let him back in, you know." T'nar nodded. "As long as his words aren't joined by his sword, that's fine with me."

Princess Celestia had been alive for over 1 thousand years, and she had seen some pretty odd stuff. None of them came anywhere near the level of odd-ness as the…thing standing before her now. "Littlefoot", it called itself. An odd name, since the creature was ANYTHING but "little". In fact, he towered above her by a good two feet, 6 inches. In his armour, which even covered his long tail, he looked like some sort of death god, and his sword, which looked like it was as long as one of his arms, made him look even more fearsome. And Celestia wasn't sure, but she had a good feeling that under his armour, he would be scarred and calloused.
This one was a killer.
Normally, that wasn't much of a problem. Celestia was far from arrogant, but she had confidence in her magic, which was stronger than most fighters in Equestria. But she could almost SEE power leaking from Littlefoot, and it was far stronger than anything she had ever encountered. Even Nightmare Moon paled beside him.
This one would need to be dealt with delicately.
"Er….is something wrong?" she asked, as politely as possible. Littlefoot looked up at her, as if he had forgotten she was there. "Not much. I've been tricked into a forced vacation to a completely alien planet and forbidden to kill anyone who makes me really angry. Other than that, I'm having a swell time." "O….k….", she said, uncertain of what to do. He sounded like he was between being thankful and exploding into a blood-rage. She prayed that the former would win.
Finally, his shoulders slumped, and his face conveyed a resigned expression. "Well, I'll just have to make the best of it", he said. Suddenly, his head jerked up, and he looked her directly in the eye- something that most of the ponies in Equestria were too afraid to do. "Are you going to be doing anything today that you rather wouldn't do?" he asked, "Like trying to solve the problems of royals and all that?" Celestia stared at him, trying to keep her jaw from dropping. She DID have to try and help the royals, something she wasn't exactly eager to do, and she would love to take a little break, but the way Littlefoot said "royals" didn't fill her with much confidence. From the tone, she guessed that he had had some bad experiences with people of royal blood. She tried to picture the warrior talking to some of the blue-bloods she had to deal with, and quickly realized that the outcome might leave some of them missing a few body parts….or their lives. "That's…kind of you...", Celestia began, but then stopped in surprise as Littlefoot was suddenly right next to her. "Don't worry", he said, "I know how to deal with blue-bloods. And besides, from what your sister told me, you've had to deal with their type for the last thousand years. You deserve some time to yourself."
Luna knows this creature? ,Celestia thought, but she then suddenly found herself being pushed out of her own palace. After a few seconds of resisting, she finally decided that Littlefoot wasn't going to take "no", for an answer, and spread her wings to fly away. As she did so, she noticed her four palace guards standing perfectly still, as if frozen. "Oh, right, them", Littlefoot said from inside, and suddenly the ponies were released, allowing them to finally collapse on the ground. Celestia prayed that nothing would go wrong, and flew off.

"Luna!"
"Wazzup, waz goin' on?" Luna yelled, falling out of her bed. She lifted her eyelids, and found her big sister standing over her. "Oh, it's just you", Luna said, calming herself down. She had thought something bad had happened.
"Why didn't you tell me we had a new guest, Luna?" Celestia asked, clearly irritated. It took a moment for Luna's tired brain to figure out what she meant. "Oh, you mean Littlefoot? Well, he told me that he wanted to meet the ruler of Equestria, and I told him about you, and he said he would like to meet you, so I didn't think that I needed to tell you. Why? Is something wrong?"
"Not yet", her sister said, "But do you know what today is? "Um…", Luna grunted, trying to work her brain, "Oh! Today is when you hold an open court for all the royals!"
"Correct", Celestia said, "Now, just a few moments ago, your new friend, for whatever reason, decided that HE would take over for me for today, and then kicked me out of the palace." "I…don't see why this is a problem", Luna said, "In fact, that sounds great! Now you have some time to spend with your friends!"
"I admit, it IS good", her sister said, "Except for one thing. You got a good look at him, didn't you?" "Yes", Luna said, "At first, he looked like a monster, but he turned out to be a really nice guy!" "He is very pleasant, but a few moments ago, I was afraid for my life. He doesn't seem require much irritation for him to be set off. Now, what are the most irritating ponies in all of Equestria?" "Royals" Luna said without hesitation.
Then it dawned on her. "Oh….." "To be fair, many of them aren't that bad. But some of them try even MY patience. Now, today, they're all going to find themselves discussing their problems to a creature none of them have even dreamed of, a creature who, from the feel of his power, wouldn't find it hard to rip them limb from limb with sheer willpower. NOW do you see the potential disaster we have on our hooves?"
Luna was alert now, and as her sister had explained, she was getting the big picture. He hadn't told her much about his personal life- in fact, it seemed like he had done his best to tell her nothing of himself- but from the way he moved, the way he had glanced all around when they had been travelling to Canterlot, and the tone he had taken on certain subjects suggested that he would much prefer to hit something than debate politics. "Uh oh…what should we do?" Luna asked. Her sister sighed. "I can't do anything. He knows me by sight, and probably by smell and the feel of my power, so I can't really do anything. So that means it's up to you to keep an eye on him and make sure he doesn't do anything….drastic." Luna really wanted to go back to sleep, but she understood too well what might happen if no one was present to help Littlefoot control himself. "All right", she answered, "I'll do it."