Luna

“...and that's-” Aegis Vigil stopped in mid-sentence, looking very disconcerted.

“What is it?” Luna asked, ears moving back in unease.

“I... I don't know.” the golden alicorn shook his head and closer his eyes. “It was as if I was suddenly reminded of something... but I do not know what...”

“How strange.” commented Luna. “Did you leave a lamp burning in the real world too long?”

“No, no.” denied Aegis. “It's more than that. It's... something I should remember, but I don't. It'll come to me later. It's happened a few times in the last years anyway. Now, where was I?”

“You said 'and that's-'” Luna reported.

“Ah. And that's why, Luna, you need to keep a constant watch on your perimeter. It doesn't matter if the pegasi think patrol duties beneath them, being taken by surprise is the last thing you want here...”

Author's Note

Ruh roh.

Note: Luna and Aegis are talking in the dreamworld, in case it's not clear.