These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Dot Hack R 1 Games
Ensemble Darkhorse: Mistral was extremely popular, so much so that after she quits in Outbreak, she shows up again near the end of Quarantine for the final battle. Skeith, too, is far more popular than any of the other Phases.
In Mistral's case, part of it was her character, and part of it was that she was one of the previous few magic specialists in the game, with one of the other two being a bit of The Scrappy and the other not joining up until around the end of Mutation.