It's Sakura Kurobane, one of the normal rarity characters from Love Live! School Idol Festival who also appeared in the Love Live! Nijigasaki High School Idol Club anime.
Activation tag is "kurobane_sakura". It replicates the character fine without appearance tags, but adding "black hair, very long hair, brown eyes" may be helpful if not. Use "twintails" for her tacky twintail hairstyle.
I plan to do more normal rarity LLSIF characters in the future. If there's any in particular you want to see, I'll take your suggestion. Note that I'm not an expert at any of this...