[Zero starts with, as if to lighten the situation. Although he imagines none of them will feel like eating after all of what comes first.
The tension within the room only hangs more heavily by the moment, and every second where he puts off speaking. It's almost enough to make him feel ill. He's sure that Yuuki shares that as well. Maybe even more than he does, because why shouldn't she? At least he has a reason that may be not as much of a blow as it could be. However there are no pretenses when it comes to Ai and Haruka.
In retrospect he feels that maybe he and Yuuki should be sitting.
For as honest, and even more so blunt as he is, Zero is finding it difficult to choose on a starting point.]
There's something we've been keeping from you. Something you deserve to know now, instead of us putting it off.
[A neutral beginning. Good. He manages to keep eye contact with them for now. However one of his hands balls into a fist, not as tight as it may grow to be.]
. . .I'm like you, Mika. My home was attacked by an especially vicious vampire. I was bitten and laid helpless as she slaughtered my family right before my eyes. When she left, my brother had gone with her.
[He adds in the latter more so because it's something of an automatic when speaking about what happened that night.]
I know what you're going through. I was thirteen when that happened.
Although, Yuuki, Ai, and Haruka. . .
[He stalls again. Maybe Yuuki should take that part.]
Hate us if you need to. Run away. Be scared.
[This time his fist does tighten, and his gaze shifts away, bangs falling over his eyes. It's more than clear (once more) that he hates having to do this.]