[ It is always hard to explain something that's so difficult, but this is Olivia, so she feels like she can say it. ]

It is. [ Well, technically not, but. Details. Unnecessary details. She's told Olivia about the Aragami a while back, but it was just in passing. ] You remember, I told you about the monsters in my world? They were very powerful. So powerful that humans can't fight them just as we are, so we had to change ourselves. We lacked the strength to defend our homes. This helps give us that strength.

[ Hopefully it would be enough. ]

I have to take it regularly or its effect diminishes.