[ Thankfully it doesn't take too long for Ange to follow up. After everything she's been through in her life, cutting herself open on the edge of Ruby's weapon isn't exactly the scariest thing she's ever done. So she can reach out easily to cut open her finger on it a moment later, letting the darkblood that's coming out of the wound flow down into the vial. ]

You can put yours in already with the rest of the stuff. [ Since Ruby's blood takes a lot more care and effort than Ange's blood - in multiple ways, since Ange isn't even thinking about the fact that Ruby has to consciously choose to let the blood flow like that. Even with knowing the other as well as she does, taking aura into consideration is still hard for a girl like Ange, who has totally grown up without the concept. ]

Once mine is full, I'll pour it in too. And then all we need to put in there is a part of us. I think the text suggested bodily liquids other than blood, but.. look, spit is going to be gross. [ That stuff is going to have to go on their faces! Ange makes A Face at the very thought. ] I figured maybe a hair might be the easiest and least gross option there?