Drawings of Nail Art - Carefully Designed

Nail art (translated as "nail polish" on pixiv) offers a way to show off your individuality, with a vibrant array of colors and designs available. When coordinated with an outfit, it can seem particularly stylish.

What characters do you think have the most impressive nails? And which do you think Itsuki (from Kakegurui) might want to add to her collection...?