Well, i'm assuming you don't know japanese so i'll use stuff that has english subtitles.
For starters, if you want to understand her popularity, i'm going to link you a 4 minute news report & skit timestamp, turn on the captions.
https://youtu.be/ZjKLq_kneBo?t=991 She used to make this show 5 times a week, it had incredibly high production values considering it was a one man show most of the time, she made everything and it took her around 6 hours of work every day, several hololive members used to be featured on every episode.
The popularity and importance of asacoco cannot be understated, she really took the vtuber world by storm for a solid 4-5 months, at it's peak there even were some nijis who used to end their streams to watch asacoco, a daily 6AM stream that got 20k viewers was unheard of at the time.
Tamaki puts it into words in this clip
https://www.youtube.com/watch?v=x0Yj2qXsYqM There's also this analysis made by a virtual economist she showed on her show a few times, it's a good read.
https://twitter.com/Seele000/status/1234808674901614592 Now, i'd be hard pressed to find a holo who is more misrepresented by clips than Coco.
She's the sweetest girl you'll ever find, she tries to put up a "strong" girl front and hates showing weakness, but it has slipped a few times, unfortunately more than ever given her current situation.
She's mostly a variety zatsudan streamer unlesss she gets really addicted to a new game like with Monster Hunter right now, she's not a streamer you will really be able to enjoy if you don't know japanese, the vast majority of her streams are entirely in japanese unless she's streaming a western game like say Terraria or Fallout at peak EOP hours, and unless she's playing Yakuza she will likely turn the stream into a zatsudan with the game as a background.
