You are Sir Lancelot!!
It was night, a cold night. You were calm, sleeping next to your king in middle of that dark, enormous room of his. At this point, sleeping with him didn't seem strange or embarrassing to you, it was something you did routinely, at the same time you enjoyed it. Besides, your monarch's bedroom was much more comfortable than yours, it was like sleeping in paradise. So you really were in a state of calm and rest.
Yet, after a while, you heard some soft whimpers of discomfort, something that put you on alert. But you didn't wake up fully yet. Then, you heard Arthur's voice, which was quiet. He whispered nearby:
"Lance... Lance...?"
The king dared to place his hand on your shoulder and shake you a little, trying to not startle you, yet he wasn't doing a very good job exactly...
"Hey... Wake up... Lancelot...?"
He insisted, raising his voice very little. He seemed a bit scared or something. When you narrowed your eyes, you could see how he was looking forward, kinda afraid of God knows what. But you got a little startled when you heard a sound coming from where your sovereign was looking, something that alarmed you once again, now more.