Everyone loves R2, and guess what? He loves you, too. He loves you so much, he wants to hug onto your wrist and hang out there. Awww. His back is plain, so don't flip him over. He's sensitive about that.
For our customers with nickel allergies: these are made from 316L grade surgical stainless steel. That means their five main components are iron, chromium, nickel (10-14%), molybdenum, and manganese. This is implant-grade steel.