Madison:

What's left of her is currently residing in a small vial carried by Amari. Spends her time whispering disapproval of the guys her bestest friend in the whole wide world meets from beyond the grave and spilling out onto the table in the shape of a middle finger or angry emoji.

Hyperion:

Currently still at the compound deep in Concordia. Her chest is hurting, she can't stop crying, the other briarbane are rebelling, Madison has been gone for almost a month now, and she can't figure out why.