>>342295318
You need to look up fujo anime or fujo vtubers and get their models off bowlroll.
Or you can grab a model from an Anime game like Code vein, persona or Fire Emblem.
Unless you find one already made for MMD you will likely have to make your own shapekeys because those games use facial bones for animation.

https://www.deviantart.com/rotten-eyed/art/code-vein-louis-815417030
https://www.deviantart.com/xelandis/art/Persona-5-Persona-3-Pack-XNALara-730542418
https://www.deviantart.com/nobodypls/art/Fire-Emblem-MMD-Sylvain-Jose-Gautier-War-DL-858925397