Oh hey, I guess Elliot likes that game, too.
I mentioned Ellen likes to tease Elliot and is a merry prankster? Yes. Yes I did. Granted, where the teasing begins in this comic is perhaps a bit difficult to discern...
And yes, Elliot and Ellen share a room at this point. There's presumably a guest room that Ellen could have taken over, but they both see this room as theirs and neither feels they have a claim to it more valid than the other, so... Yeah. Brother and sister in their late teens sharing a room when there is another room readily available. I'm sure nobody will ever find that odd ever.
Commentary added December 22, 2014