I disagree with the poster above that felt the background taking too much away from the characters. The brush itself is a nice pattern, and the color is muted, not as bright as the characters. I suppose they could be darker, but I don't think it would add anything to the background to do so.

However, I'm not as sold on the color choice - more to the point, you have two main colours (blue and red) represented in your main characters, but only blue is mirrored with your choices in the background itself, meaning Lucia (in blue) feels like she fits in with the background, but Sumire (in red) does not. I'd have either worked some red into that scrollwork (such as at the tips or edges) or chosen a more neutral colour that didn't match only one of the two.

You also have some noise in the wall (between Lucia's ear and hair, lower left corner, the darker areas to the right) which don't fit well with either the crisp characters or the scrollwork. I don't know if those are artifacts from the scans, from the brushes, or intentional, but I would clean those up.

With all that said, this is still a good wall, especially if this is a first effort. The lacy feel to the background goes well with the goth lolita style that V vs V plays to, even if it isn't greatly in evidence with the character scans here. I also like the fact that you've used your scrollwork almost as highlights/outlines for the characters themselves, instead of filling the entire background.

Hope this helps & keep up the good work