User blog comment:B214/Question and Answers 4/@comment-24173056-20150224030239/@comment-16281343-20150224141044

I don't think that would be good. Just giving the title to her just because she defeated Belial. RG employs a rating system, hence the name Rating Game. She needs to accumulate points the highest amount of points to be named Champion (higher than 3000 in this case).

Yes, these whole Rias gaining points to become Champion may not become part of the story. But just giving it to her because of a single victory? Meh.