Valentine...?

I missed my 3-hour practice doodle yesterday, so I made it up today with this.

I'm so not accustomed to drawing cute, but there's basically no other way to draw Marble, let's be honest.

Also, smudge tool hates me.  

Yes, I did screw up the shadow under her extra lock of mane.  Yes, I'm intentionally not fixing it.

GIMP 2.8.16 (2.10 WHEN?!)
Wacom Cintiq 13HD
Approx. time taken: 6 hours-ish, give or take 2.