Some might readily express their pleasure upon hearing this. After all, acknowledging that one enjoys their matches as much as the other isn't exactly some sort of surprising revelation. Why else would they continue to happen if there wasn't some enjoyment to be found in it? That isn't Vergil's way, however. Especially not when faced with as much pragmatism as there is to be found in the decision to acquire a healing ability like this one and the reason behind Mizu even engaging in fights with Vergil in the first place. So, as Vergil muddles over the relevance of his own personal feelings that go beyond the pragmatic reasons, he stands there in a silence that most would likely take as a bit awkward.

Rather than discussing the potential limits of Mizu's new ability and the implications therein, he says, "If you hunger for defeat that greatly, who am I to deny you?"

It's reasonable to question the limits considering even Vergil's ability—which arguably has more utility considering that what would be a fatal injury can prove otherwise instantly and without thought—has its limits. Until they know how frequently Mizu can heal himself and how severe the injuries can be before they outpace the ability, it's best that they keep experimentation with it a bit limited and concentrated. And Vergil doesn't really trust that Mizu is necessarily thinking of his ability in those terms. Not when he's yet to witness a limit to Vergil's own healing ability and with his own hardheadedness to simply throw himself forward in pursuit of his goals as much as possible.

But it made Mizu smile. And regardless of potential limits, there won't be weeks between their sparring any longer. So, Vergil doesn't need to be the voice of reason all the time even if he's maintaining it privately. He doesn't need to take a happy moment when there are likely so few for Mizu, and crush it beneath his heel. He can let it be and just tease Mizu instead. Even if on the surface it doesn't necessarily sound like he's teasing.