Osmosis

Catharsis is just a posh way of saying cleansing because it literally is Greek, ancient Greek for cleansing.

Osmosis means an inward thrusting or an inward pushing, but we use it to describe when something gets drawn into something.

Feels much

gentler now.

They literally osmose over time.

Osmosis is the perfect word for it.

They absorb each other's traits.

So when Claire dies, Mara and Jen remain connected, but that connection is now heavily built out of the negative space that Claire left behind.