>>11529008it's not any one thing...
1) singing chops, she's got this adorable dorky little kid voice, and an beautiful singing voice, ride on time and fly me to the moon put her on the map and broke the youtube algorithm.
2) muse dash; here is this silly stupid little shark girl and she sucks at gaming (man eater) hahaha, isn't she a joke? then muse dash happened, and she just melted gamer's minds. rhythm game skills are legit.
3) cute design
4) existing fanbase; lets be serious here, had she not dropped off the face of the earth to join hololive, senz would have been racing fbk to 1mil, still this is a bit overblown, many of 'her' fans were too high and very slow on the uptake most not realizing the connection till gura was past 1 mil subs.
5) corona-chan
6) of all the en girls she presented the strongest game streaming experience, in fact she probably was the most comfortable youtuber of the group, having been making youtube content for nearly a decade. this meant she knew how to play the algorithims, and know how to make thumbnails to get views.