>>33374425I guess it just fits the headcanon of a lot of people that played D/P/Pt. Unless if you're self-inserting, you like to give the protagonist a personality since they're mute and, maybe it's because of her conservative clothing in Platinum, people associate Dawn with being shy and serious.
As for why she's paired with Giratina or Darkrai, I guess it's just the "kawaii girl fits with powerful monster" thing.