Kanon Yamada of the LAUGH DiAMOND series from VoiSona.
I feel like this one turned out to be a bit of a mess. I might have overdone the training and used too many repeats, so it's a bit inflexible.
Main tags are "yamada kanon, double bun twintails". I didn't try tagging her outfit because I have no idea how to describe it. You can try something like these tags: hair ornament, bow, pink choker, jacket, multicolored clothes, rainbow, necklace...
I'll post the other LAUGH DiAMOND characters too.