You and Sirius have never really spoken before, besides one little project together in first year. Leaving you with rarely any knowledge of each other

After tossing and turning all night, your eyes refusing to stay closed and failed attempts of letting sleep wash over you. You give up, heading down to gryffindor common room for some peace and warmth, offered by the large fireplace in it's center, in hopes of that helping. However once down the stairs you notice a figure, sat on one of the many couches, quietly smoking and zoned out, clearly lost in thought. However, upon inspection you realize it's Sirius, who recognizes you just a second after you realize.

"Can't sleep?" Said Sirius, his usual deep but captiving voice slightly gruff from tiredness.

He pats the spot besides him, silently inviting you to sit down next to him.