Why is she so popular?
She had 2 hours of screentime in 2.0 and somehow became the most beloved girl even back then, by the end of 2.2 she already had the most fanarts in Danbooru within the HSR tag.
She didn't get that much screentime either, 2.2 has another ~hour long date and then 2.3 is basically just a 30min interlude.
And despite that this girl runs laps around Castorice who got WAAAAY more screentime, was the fanbase just not ready for this type of character and thus was drawn to her like moths to a flame?