Justo because she wants to draw it.

This literally derives from that chapter when I wanted a touhou character that uses cars.

I said that the oc should be a youkai that drives in a Toyota, and the stage + boss theme is Eurobeat driven.

She's also Byakuren's cousin.

Named Shireno Kuripe (the name? I just thought about it)

Shir in Shiro (White), -eno in Trueno

Kur- in Kuro (Black), -ipe in Stripe

The Trueno AE86 is mainly colored white but black stripes. In fact, Shireno's name is a homage to the car itself.

She's also nicknamed "Panda" due to her appearance with a black and white racer suit.

The Eurobeat stuff is a reference to Initial D as racing scenes have Eurobeat playing in the background.

After that I thought of some touhou title:
Crash of Racing Cars (actually that's not the title but I guess this one's ok)

Plot: Cars start to invade Gensokyo! It's up to Reimu, Marisa, Sanae, and Byakuren to drive the havoc out!

Idk this is actually fun XD