[Ahh... that look is so nice, somehow. Ain can't put it into words, just like everything else in his life he can't put into words, but he's so happy Vash gets it. He's so happy Vash says it, too.

The darker look on his expression flips to his usual enigmatic smile, and Ain settles back down comfortably against him, trilling high in the back of his throat.]

Good boy. I knew you'd get it. Haha, I'm happy to have you around... I wouldn't try to decorate you otherwise. Oh, and I'm glad you like the necklace, too. The gemstone isn't real, since I didn't have the money for that, but I thought it was nice anyway.

[His shiny-object-attracted brain doesn't care if the gem is real or fake, it just has to Be Sparkly and Be On Vash apparently.]