[Careful isn't going to do anything against the normal sting that cleaning a wound brings. Vash knows that sting isn't because of what his brother is doing; if anything with how careful Knives is being right now it probably hurts a lot less than it could.
That's not going to stop him from being a whinny baby about it.] Ow! Ow! Ow! Ow! That stings! [Even if Knives, who probably hasn't had to deal with a kid's scrapped knee before (except for maybe Vash when they were kids), will likely be able to tell that Vash is making a bigger deal about this then he needs to be making.]
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That's not going to stop him from being a whinny baby about it.] Ow! Ow! Ow! Ow! That stings! [Even if Knives, who probably hasn't had to deal with a kid's scrapped knee before (except for maybe Vash when they were kids), will likely be able to tell that Vash is making a bigger deal about this then he needs to be making.]