Why not? You get to spend time with someone that you like and learn a little more about their personal shopping habits and preferences! It's never just shopping either. I usually like to end them with a nice meal or some tea.

[ Shopping after all, built up an appetite. How else were you going to carry all the bags to the awaiting carriage that would take you back to your living quarters?

A smile sort of tugs at Hilda's face that implies that she's probably thinking something along the same lines of ugh, Alucard sounds like a great domestic partner - but she isn't certain how he'd take it so she refrains for the time being.

While the "reveal" of his outfit under the coat is definitely nice, it isn't what she'd call gala appropriate. She gives him a bit a skeptical look in reply - something akin to, "Oh, sweetie." ]

I think I'll have to see it to believe it like on a future shopping trip. Not that I think you're lying because you do have the figure for it. I'm just a visual learner.