First Luna is NOT boring. But I don't think Luna and Sirius would make a good pair. I love them both, Luna is so dreamy and smart, but she has very strong and diverse opinions. Sirius is great, but he's not very opened mined. I could see him teasing her if they were both in school together
Nah...Luna is quiet and doesn't really have any friends, but Sirius is confident and modest. the only thing that they have in common is that they both like helping people (mostly Harry)...I just can't picture them together.
That is quite possibly the most unlikely pair I have ever heard of. For some reason, I can't picture Sirius with anyone, he seems مزید the loner "live in the moment" type, I can't picture him in a relationship. Definatly not with Luna, though. I could see her with Neville, actually.