There is a presence in my house. It's benevolent so when I do sense it I am amused.
I named it Darryl. Don't ask me why that particular name and I don't know if it has any gender. It's not a ghost, has never been human and is a whole separate entity.
I don't know how to explain it any better. It's definitely weird but not at all frightening.

And no it's not extraterrestrial.